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TerminatedNCT04191135Updated Sep 14, 2026Results posted

Study of Olaparib Plus Pembrolizumab Versus Chemotherapy Plus Pembrolizumab After Induction With First-Line Chemotherapy Plus Pembrolizumab in Triple Negative Breast Cancer (TNBC) (MK-7339-009/KEYLYNK-009)

A Phase 2 interventional study of Pembrolizumab and Olaparib in Triple Negative Breast Neoplasms, sponsored by Merck Sharp & Dohme LLC. Terminated at 122 sites in 15 countries. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2026-09-14.

Sponsored by Merck Sharp & Dohme LLC · Phase 2, Interventional, and Treatment

Why this study was terminated
Business Reasons
Phase
Phase 2
Study type
Interventional
Enrollment
462
Allocation
Randomized
Ages
18 Years and older
Sex
All
01

Study summary

The purpose of this study is to compare the efficacy of olaparib (MK-7339) plus pembrolizumab (MK-3475) with chemotherapy plus pembrolizumab after induction with first-line chemotherapy plus pembrolizumab in triple negative breast cancer (TNBC). The primary hypotheses are:

  1. Olaparib plus pembrolizumab is superior to chemotherapy plus pembrolizumab with respect to progression-free survival (PFS).
  2. Olaparib plus pembrolizumab is superior to chemotherapy plus pembrolizumab with respect to overall survival (OS).

As of Amendment 3, study enrollment was discontinued. Participants who were receiving benefit from the study intervention could continue treatment until criteria for discontinuation are met. Participants who are on study treatment or in follow-up phase will no longer have tumor response assessments by BICR.

02

Conditions studied

  • Triple Negative Breast Neoplasms

Keywords

  • Programmed Cell Death Receptor 1 (PD-1, PD1)
  • Programmed Cell Death Receptor Ligand 1 (PD-L1, PDL1)
  • Programmed Cell Death Receptor Ligand 2 (PD-L2, PDL2)
03

In context

Triple Negative Breast Neoplasms

1,140 studies on the registry are indexed under Triple Negative Breast Neoplasms; 443 are open to participants now.

This study's enrollment of 462 is above the median of 61 across 982 interventional studies indexed under Triple Negative Breast Neoplasms.

Browse Triple Negative Breast Neoplasms studies →

Lead sponsor

Merck Sharp & Dohme LLC is the lead sponsor of 2,114 studies on the registry; 133 are open to participants now.

Of its 489 completed or terminated interventional studies of FDA-regulated products, 362 (74%) have results posted.

Counted across the registry records on this site, refreshed daily.

04

Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No

Inclusion criteria

Induction Period:

  • Has locally recurrent inoperable TNBC that has not previously been treated with chemotherapy and that cannot be treated with curative intent OR has metastatic TNBC that has not been previously treated with chemotherapy
  • Has been treated with anthracycline and/or a taxane in the neoadjuvant/adjuvant setting, if they received systemic treatment in the neoadjuvant/adjuvant setting, unless anthracycline and/or taxane was contraindicated or not considered the best treatment option for the participant in the opinion of the treating physician
  • Has measurable disease based on RECIST 1.1
  • Has provided a recently obtained or archival (no more than 3 years old) core or excisional biopsy of a tumor lesion not previously irradiated
  • Has an Eastern Cooperative Oncology Group (ECOG) performance status of 0 or 1 as assessed within 7 days prior to the start of induction study treatment
  • Has a life expectancy ≥27 weeks from the day of first study treatment
  • Demonstrate adequate organ function within 10 days prior to the start of study treatment
  • A male participant must agree to be abstinent or use contraception and refrain from donating sperm during the intervention period and for at least the time needed to eliminate each study intervention (95 days for olaparib and chemotherapy; no requirement for pembrolizumab)
  • A female participant must not be pregnant or breastfeeding and must agree to the following if is a woman of childbearing potential (WOCBP): have a negative pregnancy test within 24 hours before the start of study treatment and agree to be abstinent or use contraception and refrain from donating eggs (ova, oocytes) during the intervention period and for at least the time needed to eliminate each study intervention (180 days for olaparib and chemotherapy; 120 days for pembrolizumab)

Post-induction Period:

  • Has received up to 6 cycles but not less than 4 cycles of induction therapy without permanently discontinuing from pembrolizumab or both carboplatin and gemcitabine
  • Has achieved complete response (CR), partial response (PR), or stable disease (SD) based on RECIST 1.1 by Blinded Independent Central Review (BICR) at the Week 18 evaluation
  • Is able to complete during post-induction at least the Cycle 1, Day 1 doses of olaparib and pembrolizumab or the Cycle 1, Day 1 doses of at least one of the chemotherapy agents being administered at the end of induction (carboplatin and/or gemcitabine) in addition to pembrolizumab
  • Has ECOG performance status of 0 or 1, as assessed within 7 days prior to the start of post-induction study treatment
  • Has no higher than Grade 1 toxicities related to induction therapy (excluding alopecia) prior to randomization

Exclusion criteria

Exclusion Criteria:

Induction Period:

  • Has a known additional malignancy that is progressing or has required active treatment within the past 5 years with the exception of basal cell carcinoma of the skin, squamous cell carcinoma of the skin, or carcinoma in situ (eg, cervical cancer in situ) that have undergone potentially curative therapy
  • Has a diagnosis of immunodeficiency or is receiving chronic systemic steroid therapy (in dosing exceeding 10 mg daily of prednisone equivalent) or any other form of immunosuppressive therapy within 7 days prior the first dose of study treatment
  • Has an active autoimmune disease that has required systemic treatment in the past 2 years
  • Has known active central nervous system (CNS) metastases and/or carcinomatous meningitis
  • Has myelodysplastic syndrome (MDS)/acute myeloid leukemia (AML) or has features suggestive of MDS/AML
  • Has a history of (non-infectious) pneumonitis\interstitial lung disease that required steroids or current pneumonitis\interstitial lung disease
  • Has active, or a history of, interstitial lung disease
  • Has a known history of active tuberculosis
  • Has an active infection requiring systemic therapy
  • Has a known history of human immunodeficiency virus (HIV) infection
  • Has a known history of Hepatitis B (defined as Hepatitis B surface antigen [HBsAg] reactive) or known active Hepatitis C virus (defined as HCV RNA [qualitative] is detected) infection
  • Has a history of class II-IV congestive heart failure or myocardial infarction within 6 months of first study treatment
  • Has neuropathy ≥Grade 2
  • Has not recovered (eg, to ≤Grade 1 or to baseline) from AEs due to a previously administered therapy
  • Has a known history of hypersensitivity or allergy to pembrolizumab, olaparib and any of its components, and/or to any of the study chemotherapies (eg, carboplatin or gemcitabine) and any of their components
  • Has severe hypersensitivity (≥Grade 3) to the study treatments and/or any of their excipients
  • Has a known psychiatric or substance abuse disorder that would interfere with the participant's ability to cooperate with the requirements of the study
  • Is pregnant or breastfeeding, or expecting to conceive or father children within the projected duration of the study, starting with the Screening Visit through 180 days after the last dose of study treatment
  • Is a WOCBP who has a positive urine pregnancy test within 24 hours prior to randomization or treatment allocation
  • Has received prior therapy with either olaparib or any other poly adenosine diphosphate ribose polymerase (PARP) inhibitor
  • Has received prior radiotherapy within 2 weeks of start of study treatment
  • Has received colony-stimulating factors (eg, granulocyte colony stimulating factor [G-CSF], granulocyte macrophage colony stimulating factor [GM-CSF] or recombinant erythropoietin) within 2 weeks prior to the first dose of study treatment
  • Has had an allogenic tissue/solid organ transplant.
  • Has received previous allogenic bone marrow transplant or double umbilical cord transplantation (dUCBT)
  • Has had major surgery within 2 weeks of starting study treatment or has not recovered from any effects of any major surgery
  • Has received a live or live-attenuated vaccine within 30 days prior to first study treatment
  • Is receiving any medication prohibited in combination with study chemotherapies unless medication was stopped within 7 days prior to first study treatment
  • Has received prior therapy with an anti-PD-1, anti-PD-L1, or anti-PD-L2 agent or with an agent directed to another co-inhibitory T cell receptor (such as cytotoxic T-lymphocyte-associated protein 4 [CTLA-4], OX-40, CD137) or has previously participated in a study evaluating pembrolizumab regardless of treatment received
  • Is currently participating in or has participated in a study of an investigational agent or has used an investigational device within 4 weeks prior to the first dose of study treatment
  • Has presence of uncontrolled, potentially reversible cardiac conditions, as judged by the investigator
  • Has a history or current evidence of any condition (eg, cytopenia, transfusion-dependent anemia, or thrombocytopenia), therapy, or laboratory abnormality that might confound the results of the study, interfere with the participant's involvement for the full duration of the study, or is not in the best interest of the participant to be involved, in the opinion of the treating investigator
  • Is either unable to swallow orally administered medication or has a gastrointestinal disorder affecting absorption (eg, gastrectomy, partial bowel obstruction, malabsorption)
  • Is unlikely to comply with the study procedures, restrictions, and requirements of the study; as judged by the investigator

Post-induction Period:

  • Has severe hypersensitivity (≥Grade 3) to the study treatments and/or any of their excipients
  • Has permanently discontinued from both carboplatin and gemcitabine during induction due to toxicity
  • Has permanently discontinued from pembrolizumab during induction due to toxicity
  • Has received less than 4 cycles of chemotherapy plus pembrolizumab during induction
  • Is currently receiving either strong or moderate inhibitors of cytochrome P450 (CYP)3A4 that cannot be discontinued for the duration of the study
  • Is currently receiving either strong or moderate inducers of CYP3A4 that cannot be discontinued for the duration of the study
05

Study design

Phase
Phase 2
Primary purpose
Treatment
Allocation
Randomized
Intervention model
Parallel assignment
Masking
None (open label)
Enrollment
462 participants (actual)

Study arms

  • Experimental
    Pembrolizumab + Olaparib

    This arm includes participants who randomized following completion of the induction period. After the induction period, participants received pembrolizumab 200 mg intravenously on Day 1 of each 21-day cycle plus olaparib 300 mg orally twice daily during the post-induction period.

    Biological: Pembrolizumab · Drug: Olaparib

  • Experimental
    Pembrolizumab + Carboplatin + Gemcitabine

    This arm includes participants who randomized following completion of the induction period. Participants continued to receive both carboplatin AUC 2 with gemcitabine 1000 mg/m\^2 intravenously on Days 1 and 8 of each 21-day cycle in addition to pembrolizumab 200 mg intravenously on Day 1 of each 21-day cycle in the post-induction period.

    Biological: Pembrolizumab · Drug: Carboplatin · Drug: Gemcitabine

Interventions

  • BiologicalPembrolizumab

    intravenous (IV) infusion

    Also known as: KEYTRUDA®, MK-3475

  • DrugOlaparib

    oral tablets

    Also known as: LYNPARZA®, MK-7339, AZD2281, KU-0059436

  • DrugCarboplatin

    IV infusion

    Also known as: PARAPLATIN®

  • DrugGemcitabine

    IV infusion

    Also known as: GEMZAR®

06

What researchers measure

Primary outcomes

  1. Progression-Free Survival (PFS)

    PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  2. Overall Survival (OS)

    OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. OS is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

Secondary outcomes

  1. Progression-Free Survival (PFS) in Participants With Programmed Cell Death-Ligand 1 (PD-L1) Positive Tumors With a Combined Positive Score (CPS) ≥10

    PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. Only participants with a CPS ≥10 were included in this analysis. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  2. Overall Survival (OS) in Participants With PD-L1 Positive Tumors With a CPS ≥10

    OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Only participants with a CPS ≥10 were included in this analysis.

    Time frame: Up to approximately 29 months

  3. PFS in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

    PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. Only participants with BRCAm-positive tumors were included in this analysis. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  4. OS in Participants With BRCAm Tumors

    OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Only participants with BRCAm-positive tumors were included in this analysis.

    Time frame: Up to approximately 29 months

  5. Change From Baseline in Health-Related Quality-of-Life (QoL) Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 29 and 30 Combined Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Change from baseline in EORTC QLQ-C30 Items 29 and 30 combined scores was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

    Time frame: Baseline and week 18

  6. Change From Baseline in Physical Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 1- 5 Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in physical functioning (EORTC QLQ-C30 Items 1-5) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

    Time frame: Baseline and week 18

  7. Change From Baseline in Emotional Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 21-24 Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Change from baseline in emotional functioning (EORTC QLQ-C30 Items 21-24) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

    Time frame: Baseline and week 18

  8. Change From Baseline in Systemic Therapy Side Effects Using the European Organization for Research and Treatment of Cancer Breast Cancer-Specific QoL Questionnaire (EORTC QLQ-BR23) Items 1-4, 6, 7, and 8 Score

    EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30, consisting of functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All, 4=Very Much). Using linear transformation, raw scores are standardized, so scores range from 0 to 100. A higher score indicates a better quality of life. The change from baseline in systemic therapy side effects (EORTC QLQ-BR23 Items 1-4, 6, 7, and 8) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

    Time frame: Baseline and week 18

  9. Change From Baseline in Visual Analogue Scale (VAS) Score on the European Quality of Life 5-dimension, 5-level Questionnaire (EQ-5D-5L)

    The EQ-5D-5L is a questionnaire developed to assess health-related outcomes. The VAS is a component of the EQ-5D-5L that asks participants to rate their overall health on a vertical visual analogue scale, with the scale's ends labelled 'The best health you can imagine' (equivalent to a score of 0) and 'The worst health you can imagine' (equivalent to a score of 100). The change from baseline in VAS score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

    Time frame: Baseline and week 18

  10. Change From Baseline in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Combined Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in EORTC QLQ-C30 Items 29 and 30 scores was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

    Time frame: Baseline and up to 18 weeks

  11. Change From Baseline in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in physical functioning (EORTC QLQ-C30 Items 1-5) score was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

    Time frame: Baseline and week 18

  12. Change From Baseline in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in emotional functioning (EORTC QLQ-C30 Items 21-24) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

    Time frame: Baseline and week 18

  13. Change From Baseline in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors

    EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30, consisting of functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All, 4=Very Much). Using linear transformation, raw scores are standardized, so scores range from 0 to 100. A higher score indicates a better quality of life. The change from baseline in systemic therapy side effects (EORTC QLQ-BR23 Items 1-4, 6, 7, and 8) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

    Time frame: Baseline and week 18

  14. Change From Baseline in Visual Analogue Scale (VAS) Score on the EQ-5D-5L in Participants With BRCAm Tumors

    The EQ-5D-5L is a questionnaire developed to assess health-related outcomes. The VAS is a component of the EQ-5D-5L that asks participants to rate their overall health on a vertical visual analogue scale, with the scale's ends labelled 'The best health you can imagine' (equivalent to a score of 0) and 'The worst health you can imagine' (equivalent to a score of 100). The change from baseline in VAS score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

    Time frame: Baseline and week 18

  15. Time to Deterioration (TTD) in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in Items 29 and 30 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Baseline and up to approximately 29 months

  16. TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in physical functioning Items 1 to 5 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  17. TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in emotional functioning Items 21-24 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  18. TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score

    EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30 and consists of four functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and four symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All to 4=Very Much). Using linear transformation, raw scores are standardized, so that scores range from 0 to 100. A higher score indicates a better quality of life. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in systemic therapy side effects Items 1-4, 6, 7 and 8 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  19. TTD in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in Items 29 and 30 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Baseline and up to approximately 29 months

  20. TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in physical functioning Items 1 to 5 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  21. TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors

    EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in emotional functioning Items 21-24 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  22. TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors

    EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30 and consists of four functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and four symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All to 4=Very Much). Using linear transformation, raw scores are standardized, so that scores range from 0 to 100. A higher score indicates a better quality of life. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in systemic therapy side effects Items 1-4, 6, 7 and 8 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

    Time frame: Up to approximately 29 months

  23. Number of Participants Who Experienced At Least One Adverse Event (AE)

    An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who experience at least 1 AE is presented.

    Time frame: Up to approximately 29 months

  24. Number of Participants Who Discontinued Study Treatment Due to an Adverse Event (AE)

    An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who discontinued study treatment due to an AE is presented.

    Time frame: Up to approximately 29 months

07

Results

Posted Feb 14, 2024

Participant flow

Induction Treatment
Participant flow — Induction Treatment
MilestonePembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Started46200
Treated46000
Completed000
Not completed46200
Withdrew: Not treated200
Withdrew: Ongoing to blinded treatment period27100
Withdrew: Adverse event2500
Withdrew: Clinical progression800
Withdrew: Excluded medication100
Withdrew: Failure to meet continuation criteria200
Withdrew: Failure to meet randomization criteria200
Withdrew: Physician decision200
Withdrew: Progressive disease13500
Withdrew: Protocol violation1000
Withdrew: Withdrawal by subject400
Randomized Treatment
Participant flow — Randomized Treatment
MilestonePembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Started0135136
Treated0135133
Completed000
Not completed0135136
Withdrew: Death05054
Withdrew: Lost to follow-up001
Withdrew: Withdrawal by subject020
Withdrew: Ongoing in trial08381

Outcome measures

PrimaryProgression-Free Survival (PFS)

PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
Progression-Free Survival (PFS)
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Progression-Free Survival (PFS)5.5 (4.2 to 8.3)5.6 (4.3 to 6.9)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.4556 (One-sided p-value based on log-rank test stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).) · Hazard ratio (hr): 0.98 · 95% CI 0.72 to 1.33Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
PrimaryOverall Survival (OS)

OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. OS is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
Overall Survival (OS)
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Overall Survival (OS)25.1 (18.3 to NA)23.4 (15.8 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.3903 (One-sided p-value based on log-rank test stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).) · Hazard ratio (hr): 0.95 · 95% CI 0.64 to 1.40Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
SecondaryProgression-Free Survival (PFS) in Participants With Programmed Cell Death-Ligand 1 (PD-L1) Positive Tumors With a Combined Positive Score (CPS) ≥10

PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. Only participants with a CPS ≥10 were included in this analysis. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
Progression-Free Survival (PFS) in Participants With Programmed Cell Death-Ligand 1 (PD-L1) Positive Tumors With a Combined Positive Score (CPS) ≥10
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Progression-Free Survival (PFS) in Participants With Programmed Cell Death-Ligand 1 (PD-L1) Positive Tumors With a Combined Positive Score (CPS) ≥105.7 (2.9 to 13.9)5.7 (3.8 to 7.6)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Hazard ratio (hr): 0.92 · 95% CI 0.59 to 1.43Estimate based on stratified Cox model with Efron's method of tie handling with treatment as a covariate stratified by response to the induction therapy (CR or PR versus SD) and BRCA status (BRCAm versus BRCAwt).
SecondaryOverall Survival (OS) in Participants With PD-L1 Positive Tumors With a CPS ≥10

OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Only participants with a CPS ≥10 were included in this analysis.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
Overall Survival (OS) in Participants With PD-L1 Positive Tumors With a CPS ≥10
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Overall Survival (OS) in Participants With PD-L1 Positive Tumors With a CPS ≥10NA (17.0 to NA)NA (15.5 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Hazard ratio (hr): 0.97 · 95% CI 0.53 to 1.76Estimate based on stratified Cox model with Efron's method of tie handling with treatment as a covariate stratified by response to the induction therapy (CR or PR versus SD) and BRCA status (BRCAm versus BRCAwt).
SecondaryPFS in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

PFS was defined as the time from randomization to the first documented progressive disease (PD) per Response Evaluation Criteria in Solid Tumors Version 1.1 (RECIST 1.1) as Assessed by Blinded Independent Central Review (BICR), or death due to any cause, whichever occurs first. Per RECIST 1.1, PD was defined as ≥20% increase in the sum of diameters (SOD) of target lesions. In addition to the relative increase of 20%, the sum had to demonstrate an absolute increase of ≥5 mm. The appearance of one or more new lesions was also considered PD. Only participants with BRCAm-positive tumors were included in this analysis. PFS is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
PFS in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
PFS in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors12.4 (8.3 to NA)8.4 (5.4 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Hazard ratio (hr): 0.70 · 95% CI 0.33 to 1.48Estimate based on stratified Cox model with Efron's method of tie handling with treatment as a covariate stratified by response to the induction therapy (CR or PR versus SD) and tumor PD-L1 status (CPS≥1 vs CPS\<1).
SecondaryOS in Participants With BRCAm Tumors

OS was defined as the time from randomization to death due to any cause. Participants without documented death at the time of the final analysis were censored at the date of the last follow-up. Only participants with BRCAm-positive tumors were included in this analysis.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
OS in Participants With BRCAm Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
OS in Participants With BRCAm TumorsNA (17.1 to NA)23.4 (17.3 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Hazard ratio (hr): 0.81 · 95% CI 0.28 to 2.37Estimate based on stratified Cox model with Efron's method of tie handling with treatment as a covariate stratified by response to the induction therapy (CR or PR versus SD) and tumor PD-L1 status (CPS≥1 vs CPS\<1).
SecondaryChange From Baseline in Health-Related Quality-of-Life (QoL) Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 29 and 30 Combined Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Change from baseline in EORTC QLQ-C30 Items 29 and 30 combined scores was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Health-Related Quality-of-Life (QoL) Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 29 and 30 Combined Score
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Health-Related Quality-of-Life (QoL) Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 29 and 30 Combined Score-5.82 (-9.03 to -2.61)-2.54 (-5.71 to 0.64)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.1430 · Difference in least squares means: -3.28 · 95% CI -7.69 to 1.12cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Physical Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 1- 5 Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in physical functioning (EORTC QLQ-C30 Items 1-5) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Physical Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 1- 5 Score
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Physical Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 1- 5 Score-2.86 (-6.29 to 0.57)-2.69 (-6.09 to 0.70)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.9454 · Difference in least squares means: -0.16 · 95% CI -4.89 to 4.56cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Emotional Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 21-24 Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. Change from baseline in emotional functioning (EORTC QLQ-C30 Items 21-24) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Emotional Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 21-24 Score
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Emotional Functioning Using the European Organization for Research and Treatment of Cancer Quality of Life Questionnaire Core 30 (EORTC QLQ-C30) Items 21-24 Score-0.46 (-4.30 to 3.38)-2.53 (-6.32 to 1.25)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.4351 · Difference in least squares means: 2.08 · 95% CI -3.16 to 7.31cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Systemic Therapy Side Effects Using the European Organization for Research and Treatment of Cancer Breast Cancer-Specific QoL Questionnaire (EORTC QLQ-BR23) Items 1-4, 6, 7, and 8 Score

EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30, consisting of functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All, 4=Very Much). Using linear transformation, raw scores are standardized, so scores range from 0 to 100. A higher score indicates a better quality of life. The change from baseline in systemic therapy side effects (EORTC QLQ-BR23 Items 1-4, 6, 7, and 8) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Systemic Therapy Side Effects Using the European Organization for Research and Treatment of Cancer Breast Cancer-Specific QoL Questionnaire (EORTC QLQ-BR23) Items 1-4, 6, 7, and 8 Score
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Systemic Therapy Side Effects Using the European Organization for Research and Treatment of Cancer Breast Cancer-Specific QoL Questionnaire (EORTC QLQ-BR23) Items 1-4, 6, 7, and 8 Score-0.91 (-3.27 to 1.44)-1.84 (-4.17 to 0.48)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.5588 · Difference in least squares means: 0.93 · 95% CI -2.20 to 4.06cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Visual Analogue Scale (VAS) Score on the European Quality of Life 5-dimension, 5-level Questionnaire (EQ-5D-5L)

The EQ-5D-5L is a questionnaire developed to assess health-related outcomes. The VAS is a component of the EQ-5D-5L that asks participants to rate their overall health on a vertical visual analogue scale, with the scale's ends labelled 'The best health you can imagine' (equivalent to a score of 0) and 'The worst health you can imagine' (equivalent to a score of 100). The change from baseline in VAS score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1) and BRCA status at randomization (BRCAm vs. BRCAwt)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Visual Analogue Scale (VAS) Score on the European Quality of Life 5-dimension, 5-level Questionnaire (EQ-5D-5L)
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Visual Analogue Scale (VAS) Score on the European Quality of Life 5-dimension, 5-level Questionnaire (EQ-5D-5L)-2.74 (-5.36 to -0.12)-2.37 (-4.97 to 0.24)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.8408 · Difference in least squares means: -0.37 · 95% CI -4.03 to 3.28cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Combined Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in EORTC QLQ-C30 Items 29 and 30 scores was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

Time frame:
Baseline and up to 18 weeks
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Combined Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Combined Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors-4.85 (-12.43 to 2.73)-3.51 (-11.17 to 4.15)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.7950 · Difference in least squares means: -1.34 · 95% CI -11.63 to 8.95cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in physical functioning (EORTC QLQ-C30 Items 1-5) score was calculated based on a constrained longitudinal data analysis (cLDA) model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors4.12 (-0.68 to 8.92)-0.70 (-5.62 to 4.21)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.1597 · Difference in least squares means: 4.82 · 95% CI -1.97 to 11.62cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. The change from baseline in emotional functioning (EORTC QLQ-C30 Items 21-24) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors-1.50 (-8.41 to 5.41)-4.02 (-11.15 to 3.11)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.6138 · Difference in least squares means: 2.52 · 95% CI -7.45 to 12.49cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors

EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30, consisting of functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All, 4=Very Much). Using linear transformation, raw scores are standardized, so scores range from 0 to 100. A higher score indicates a better quality of life. The change from baseline in systemic therapy side effects (EORTC QLQ-BR23 Items 1-4, 6, 7, and 8) score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors-4.27 (-8.27 to -0.27)-2.67 (-6.77 to 1.43)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.5567 · Difference in least squares means: -1.60 · 95% CI -7.02 to 3.83cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryChange From Baseline in Visual Analogue Scale (VAS) Score on the EQ-5D-5L in Participants With BRCAm Tumors

The EQ-5D-5L is a questionnaire developed to assess health-related outcomes. The VAS is a component of the EQ-5D-5L that asks participants to rate their overall health on a vertical visual analogue scale, with the scale's ends labelled 'The best health you can imagine' (equivalent to a score of 0) and 'The worst health you can imagine' (equivalent to a score of 100). The change from baseline in VAS score was calculated based on a cLDA model with scores as response variable with covariates for treatment by time interaction, stratification factors (response at randomization (CR/PR vs. SD), and baseline CPS for PD-L1 expression (PD-L1 CPS\<1 vs. PD-L1 CPS≥1)) as covariates.

Time frame:
Baseline and week 18
Reported as:
Least squares mean · Score on a Scale
Change From Baseline in Visual Analogue Scale (VAS) Score on the EQ-5D-5L in Participants With BRCAm Tumors
Score on a ScalePembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Change From Baseline in Visual Analogue Scale (VAS) Score on the EQ-5D-5L in Participants With BRCAm Tumors1.73 (-3.08 to 6.54)-3.83 (-8.77 to 1.11)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · cLDA · p = 0.1050 · Difference in least squares means: 5.56 · 95% CI -1.20 to 12.32cLDA model with PRO scores as the response variable with covariates for treatment by time interaction, stratification factors as covariates.
SecondaryTime to Deterioration (TTD) in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in Items 29 and 30 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Baseline and up to approximately 29 months
Reported as:
Median · Months
Time to Deterioration (TTD) in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Time to Deterioration (TTD) in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score10.3 (4.2 to NA)NA (13.2 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.00676 · Hazard ratio (hr): 1.78 · 95% CI 1.16 to 2.71Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
SecondaryTTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in physical functioning Items 1 to 5 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 ScoreNA (NA to NA)NA (NA to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.96425 · Hazard ratio (hr): 1.01 · 95% CI 0.61 to 1.69Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
SecondaryTTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in emotional functioning Items 21-24 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 ScoreNA (NA to NA)NA (14.5 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.74965 · Hazard ratio (hr): 1.08 · 95% CI 0.69 to 1.71Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
SecondaryTTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score

EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30 and consists of four functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and four symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All to 4=Very Much). Using linear transformation, raw scores are standardized, so that scores range from 0 to 100. A higher score indicates a better quality of life. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in systemic therapy side effects Items 1-4, 6, 7 and 8 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 ScoreNA (NA to NA)NA (NA to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.10502 · Hazard ratio (hr): 1.76 · 95% CI 0.88 to 3.53Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), tumor PD-L1 status (CPS ≥1 vs CPS \<1) and BRCA Status (BRCAm versus wild type BRCA gene).
SecondaryTTD in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to the Global Health Status (GHS) question "How would you rate your overall health during the past week?" (Item 29) and the QoL question "How would you rate your overall quality of life during the past week?" (Item 30) were each scored on a 7-point scale (1=Very Poor to 7=Excellent), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in Items 29 and 30 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Baseline and up to approximately 29 months
Reported as:
Median · Months
TTD in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Health-Related QoL Using the EORTC QLQ-C30 Items 29 and 30 Score in Participants With Breast Cancer Susceptibility Gene Mutation (BRCAm) Tumors7.9 (3.7 to NA)NA (3.5 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.50190 · Hazard ratio (hr): 1.31 · 95% CI 0.57 to 3.00Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), and tumor PD-L1 status (CPS ≥1 vs CPS \<1).
SecondaryTTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 5 questions about their physical functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in physical functioning Items 1 to 5 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Physical Functioning Using the EORTC QLQ-C30 Items 1- 5 Score in Participants With BRCAm TumorsNA (10.4 to NA)NA (NA to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.47384 · Hazard ratio (hr): 0.68 · 95% CI 0.24 to 1.97Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), and tumor PD-L1 status (CPS ≥1 vs CPS \<1).
SecondaryTTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors

EORTC QLQ-C30 is a 30-item questionnaire developed to assess the QoL of cancer patients. Participant responses to 4 questions about their emotional functioning are scored on a 4-point scale (1=Not at All to 4=Very Much), then summed. Summed raw scores were standardized by linear transformation so that scores ranged from 0 to 100, with a higher score indicating a better overall outcome. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in emotional functioning Items 21-24 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Emotional Functioning Using the EORTC QLQ-C30 Items 21-24 Score in Participants With BRCAm TumorsNA (7.9 to NA)NA (15.4 to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.81463 · Hazard ratio (hr): 0.88 · 95% CI 0.33 to 2.38Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), and tumor PD-L1 status (CPS ≥1 vs CPS \<1).
SecondaryTTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors

EORTC-QLQ-BR23 is a 23-item breast cancer-specific companion module to the EORTC-QLQ-C30 and consists of four functional scales (body image, sexual enjoyment, sexual functioning, future perspective) and four symptom scales (systemic therapy side effects, upset by hair loss, arm symptoms, breast symptoms). Participant responses to 7 questions about their systemic therapy side effects are scored on a 4-point scale (1=Not at All to 4=Very Much). Using linear transformation, raw scores are standardized, so that scores range from 0 to 100. A higher score indicates a better quality of life. TTD was defined as the time from baseline to the first onset of a ≥10-point decrease with confirmation by the subsequent visit of a ≥10-point decrease in systemic therapy side effects Items 1-4, 6, 7 and 8 scale scores. TTD is reported based on the product-limit (Kaplan-Meier) method for censored data.

Time frame:
Up to approximately 29 months
Reported as:
Median · Months
TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm Tumors
MonthsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
TTD in Systemic Therapy Side Effects Using the EORTC QLQ-BR23 Items 1-4, 6, 7, and 8 Score in Participants With BRCAm TumorsNA (NA to NA)NA (NA to NA)
Statistical analysis
  • Pembrolizumab + Olaparib vs Pembrolizumab + Carboplatin + Gemcitabine · Log Rank · p = 0.67255 · Hazard ratio (hr): 1.47 · 95% CI 0.24 to 8.82Estimate via stratified Cox model with Efron's handling method with treatment as a covariate stratified by response to the induction therapy (CR/PR versus SD), and tumor PD-L1 status (CPS ≥1 vs CPS \<1).
SecondaryNumber of Participants Who Experienced At Least One Adverse Event (AE)

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who experience at least 1 AE is presented.

Time frame:
Up to approximately 29 months
Reported as:
Count of participants · Participants
Number of Participants Who Experienced At Least One Adverse Event (AE)
ParticipantsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Number of Participants Who Experienced At Least One Adverse Event (AE)126130
SecondaryNumber of Participants Who Discontinued Study Treatment Due to an Adverse Event (AE)

An AE is any untoward medical occurrence in a clinical study participant, temporally associated with the use of study intervention, whether or not considered related to the study intervention. An AE can therefore be any unfavorable and unintended sign (including an abnormal laboratory finding), symptom, or disease (new or exacerbated) temporally associated with the use of a study intervention. The number of participants who discontinued study treatment due to an AE is presented.

Time frame:
Up to approximately 29 months
Reported as:
Count of participants · Participants
Number of Participants Who Discontinued Study Treatment Due to an Adverse Event (AE)
ParticipantsPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
Number of Participants Who Discontinued Study Treatment Due to an Adverse Event (AE)1528

Adverse events

Collected over Up to approximately 29 months. Non-serious events are listed at a 5% frequency threshold.

Adverse event summary by group
GroupDeathsSeriousOther
Pembrolizumab + Carboplatin + Gemcitabine Induction Treatment124/460 (27%)80/460 (17.4%)456/460 (99.1%)
Pembrolizumab + Olaparib50/135 (37%)35/135 (25.9%)121/135 (89.6%)
Pembrolizumab + Carboplatin + Gemcitabine54/136 (39.7%)32/133 (24.1%)128/133 (96.2%)
Most frequent serious events
Showing 10 of 111
Most frequent serious events
EventPembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
PneumoniaInfections and infestations5/4602/1353/133
PyrexiaGeneral disorders1/4603/1351/133
Febrile neutropeniaBlood and lymphatic system disorders8/4601/1350/133
AnaemiaBlood and lymphatic system disorders6/4602/1352/133
PancytopeniaBlood and lymphatic system disorders3/4601/1352/133
ThrombocytopeniaBlood and lymphatic system disorders5/4600/1352/133
Upper respiratory tract infectionInfections and infestations0/4600/1352/133
Platelet count decreasedInvestigations1/4601/1352/133
Haemophagocytic lymphohistiocytosisImmune system disorders0/4602/1350/133
SepsisInfections and infestations0/4602/1350/133
Most frequent other events
Showing 10 of 52
Most frequent other events
EventPembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + Gemcitabine
AnaemiaBlood and lymphatic system disorders274/46054/13569/133
NeutropeniaBlood and lymphatic system disorders218/46028/13555/133
NauseaGastrointestinal disorders207/46051/13536/133
Alanine aminotransferase increasedInvestigations162/4608/13532/133
Neutrophil count decreasedInvestigations141/46018/13542/133
ThrombocytopeniaBlood and lymphatic system disorders133/46022/13541/133
ConstipationGastrointestinal disorders141/46014/13513/133
Aspartate aminotransferase increasedInvestigations136/46010/13529/133
Platelet count decreasedInvestigations95/46016/13536/133
FatigueGeneral disorders124/46022/13523/133

Baseline characteristics

Age, Continuous
Age, Continuous(Years)Pembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + GemcitabineTotal
Mean53.8 ± 12.753.9 ± 12.052.9 ± 12.553.6 ± 12.4
Sex: Female, Male
Sex: Female, Male(Participants)Pembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + GemcitabineTotal
Female188135136459
Male1001
Ethnicity (NIH/OMB)
Ethnicity (NIH/OMB)(Participants)Pembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + GemcitabineTotal
Hispanic or Latino26331978
Not Hispanic or Latino13779102318
Unknown or Not Reported26231564
Race (NIH/OMB)
Race (NIH/OMB)(Participants)Pembrolizumab + Carboplatin + Gemcitabine Induction TreatmentPembrolizumab + OlaparibPembrolizumab + Carboplatin + GemcitabineTotal
American Indian or Alaska Native3025
Asian39293098
Native Hawaiian or Other Pacific Islander1001
Black or African American65213
White1127084266
More than one race714728
Unknown or Not Reported21171149
08

Study locations

122 sites
  • Pacific Cancer Care ( Site 0142)
    Monterey, California 93940, United States
  • UCSF Helen Diller Family Comprehensive Cancer Center ( Site 0138)
    San Francisco, California 94158, United States
  • John Wayne Cancer Institute ( Site 0111)
    Santa Monica, California 90404, United States
  • St. Joseph Heritage Healthcare ( Site 0104)
    Santa Rosa, California 95403, United States
  • University of Miami Sylvester CC ( Site 0146)
    Miami, Florida 33136, United States
  • Georgia Cancer Center at Augusta University ( Site 0129)
    Augusta, Georgia 30912, United States
  • University of Chicago ( Site 0159)
    Chicago, Illinois 60637, United States
  • Massachusetts General Hospital ( Site 0155)
    Boston, Massachusetts 02114, United States
  • Henry Ford Health System ( Site 0103)
    Detroit, Michigan 48202, United States
  • Virginia Piper Cancer Institute ( Site 0157)
    Minneapolis, Minnesota 55407, United States
  • Memorial Sloan Kettering Cancer Center- Monmouth ( Site 0161)
    Middletown, New Jersey 07748, United States
  • MSKCC-Bergen ( Site 0162)
    Montvale, New Jersey 07645, United States
  • Memorial Sloan-Kettering Cancer Center at Commack ( Site 0160)
    Commack, New York 11725, United States
  • Memorial Sloan-Kettering Cancer Center ( Site 0156)
    New York, New York 10065, United States
  • Mercy Clinic Oncology and Hematology ( Site 0110)
    Oklahoma City, Oklahoma 73120, United States
  • The Center For Cancer And Blood Disorders ( Site 0151)
    Fort Worth, Texas 76104, United States
  • Texas Oncology-New Braunfels ( Site 0168)
    New Braunfels, Texas 78130, United States
  • Texas Oncology-San Antonio Northeast ( Site 0165)
    San Antonio, Texas 78217, United States
  • Texas Oncology-San Antonio Medical Center ( Site 0158)
    San Antonio, Texas 78240, United States
  • Texas Oncology - San Antonio Stone Oak ( Site 0166)
    San Antonio, Texas 78258, United States
  • Renovatio Clinical ( Site 0117)
    The Woodlands, Texas 77380, United States
  • Virginia Oncology Associates ( Site 0163)
    Newport News, Virginia 23606, United States
  • Virginia Oncology Associates ( Site 0153)
    Norfolk, Virginia 23502, United States
  • Virginia Oncology Associates ( Site 0164)
    Virginia Beach, Virginia 23456, United States
  • YVMH dba Virginia Mason Memorial/North Star Lodge Cancer Center ( Site 0128)
    Yakima, Washington 98902, United States
  • Princess Margaret Cancer Centre ( Site 0005)
    Toronto, Ontario M5G 2M9, Canada
  • CSSS de Laval- Hopital de la Cite de la Sante ( Site 0011)
    Laval, Quebec H7M 3L9, Canada
  • Centre Hospitalier de l Universite de Montreal - CHUM ( Site 0003)
    Montreal, Quebec H2X 3E4, Canada
  • Jewish General Hospital ( Site 0010)
    Montreal, Quebec H3T 1E2, Canada
  • McGill University Health Centre ( Site 0002)
    Montreal, Quebec H4A 3J1, Canada
  • Centro Investigación del Cáncer James Lind ( Site 0510)
    Temuco, Araucania 4780000, Chile
  • IC La Serena Research ( Site 0511)
    La Serena, Coquimbo Region 1720430, Chile
  • Fundacion Arturo Lopez Perez ( Site 0500)
    Santiago, Region M. de Santiago 7500921, Chile
  • Pontificia Universidad Catolica de Chile ( Site 0501)
    Santiago, Region M. de Santiago 8330032, Chile
  • Oncocentro ( Site 0502)
    Viña del Mar, Valparaiso 2520598, Chile
  • Fundacion Colombiana de Cancerologia Clinica Vida ( Site 0601)
    Medellín, Antioquia 050030, Colombia
  • Clinica de la Costa Ltda. ( Site 0600)
    Barranquilla, Atlántico 080020, Colombia
  • Organizacion Clinica Bonnadona-Prevenir S.A.S. ( Site 0609)
    Barranquilla, Atlántico 080020, Colombia
  • Oncomedica S.A. ( Site 0606)
    Montería, Departamento de Córdoba 230002, Colombia
  • Fundacion Valle del Lili ( Site 0602)
    Cali, Valle del Cauca Department 760032, Colombia
  • Hemato Oncologos S.A. ( Site 0603)
    Cali, Valle del Cauca Department 760042, Colombia
  • Centre Francois Baclesse ( Site 1012)
    Caen, Calvados 14076, France
  • CHU-Jean Minjoz ( Site 1013)
    Besançon, Doubs 25030, France
  • Institut Claudius Regaud IUCT Oncopole ( Site 1001)
    Toulouse, Haute-Garonne 31059, France
  • Centre de Cancerologie du Grand Montpellier ( Site 1009)
    Montpellier, Languedoc-Roussillon 34070, France
  • CHR-METZ-THIONVILLE - Hopital de Mercy ( Site 1007)
    Metz, Moselle 57085, France
  • Centre Jean Perrin ( Site 1003)
    Clermont-Ferrand, Puy-de-Dome 63001, France
  • Centre Leon Berard ( Site 1018)
    Lyon, Rhone 69373, France
  • Centre Henri Becquerel ( Site 1020)
    Rouen, Seine-Maritime 76038, France
  • CHU Amiens Hopital Sud ( Site 1023)
    Amiens, Somme 80000, France
  • Institut Gustave Roussy ( Site 1010)
    Villejuif, Val-de-Marne 94805, France
  • Institut Sainte Catherine ( Site 1026)
    Avignon, Vaucluse 84918, France
  • Hôpital Saint-Louis ( Site 1025)
    Paris, 75010, France
  • Universitaetsklinikum Mannheim GmbH ( Site 1213)
    Mannheim, Baden-Wurttemberg 68167, Germany
  • Universitaetsklinikum Erlangen ( Site 1201)
    Erlangen, Bavaria 91054, Germany
  • Klinik und Poliklinik fuer Frauenheilkunde und Geburtshilfe ( Site 1200)
    Munich, Bavaria 80337, Germany
  • Hochwaldkrankenhaus Bad Nauheim ( Site 1211)
    Bad Nauheim, Hesse 61231, Germany
  • Sana Klinikum Offenbach Klinik fuer Gynakologie und Geburtshilfe ( Site 1206)
    Offenbach, Hesse 63069, Germany
  • Gynaekologisch-onkologische Praxis Hannover ( Site 1207)
    Hanover, Lower Saxony 30177, Germany
  • Gynaekologisches Zentrum-Schwerpunkt Gyn. Onkologie ( Site 1205)
    Bonn, North Rhine-Westphalia 53111, Germany
  • Universitaetsklinikum AoeR Duesseldorf ( Site 1210)
    Düsseldorf, North Rhine-Westphalia 40225, Germany
  • Kliniken Essen-Mitte ( Site 1215)
    Essen, North Rhine-Westphalia 45136, Germany
  • Frauenklinik St. Louise ( Site 1216)
    Paderborn, North Rhine-Westphalia 33098, Germany
  • Universitaetsklinikum Carl Gustav Carus ( Site 1203)
    Dresden, Saxony 01307, Germany
  • Pecsi Tudomanyegyetem Klinikai Kozpont ( Site 1607)
    Pécs, Baranya 7624, Hungary
  • Bacs-Kiskun Megyei Korhaz-Onkoradiologiai Kozpont ( Site 1608)
    Kecskemét, Bács-Kiskun county 6000, Hungary
  • Jasz Nagykun Szolnok Megyei Hetenyi Geza Korhaz Rendelointezet ( Site 1601)
    Szolnok, Jász-Nagykun-Szolnok 5000, Hungary
  • Zala Megyei Szent Rafael Korhaz ( Site 1605)
    Zalaegerszeg, Zala County 8900, Hungary
  • Orszagos Onkologiai Intezet ( Site 1602)
    Budapest, 1122, Hungary
  • Debreceni Egyetem Klinikai Kozpont ( Site 1600)
    Debrecen, 4032, Hungary
  • Somogy Megyei Kaposi Mor Oktato Korhaz ( Site 1604)
    Kaposvár, 7400, Hungary
  • Cork University Hospital ( Site 0902)
    Cork, T12 DC4A, Ireland
  • St Vincents University Hospital ( Site 0900)
    Dublin, D04 YN63, Ireland
  • Aichi Cancer Center Hospital ( Site 2202)
    Nagoya, Aichi-ken 464-8681, Japan
  • Hyogo College of Medicine Hospital ( Site 2203)
    Nishinomiya, Hyōgo 663-8501, Japan
  • Fukushima Medical University Hospital ( Site 2201)
    Fukushima, 960-1295, Japan
  • Hiroshima City Hiroshima Citizens Hospital ( Site 2204)
    Hiroshima, 730-8518, Japan
  • National Hospital Organization - Osaka National Hospital - Institute For Clinical Research (Site 2200)
    Osaka, 540-0006, Japan
  • Pleszewskie Centrum Medyczne w Pleszewie Sp. z o.o. ( Site 1909)
    Pleszew, Greater Poland Voivodeship 65-300, Poland
  • Pratia MCM Krakow ( Site 1919)
    Krakow, Lesser Poland Voivodeship 30-510, Poland
  • Regionalny Szpital Specjalistyczny Latawiec ( Site 1917)
    Swidnica, Lower Silesian Voivodeship 58-100, Poland
  • Narodowy Instytut Onkologii im. Marii Sklodowskiej-Curie - Panstwowy Instytut Badawczy w Warszawie (Site 1908)
    Warsaw, Masovian Voivodeship 02-781, Poland
  • Szpital Morski im. PCK. Szpitale Pomorskie Sp. Z o.o ( Site 1913)
    Gdynia, Pomeranian Voivodeship 81-519, Poland
  • Narodowy Instytut Onkologii - Oddzial w Gliwicach ( Site 1912)
    Gliwice, Silesian Voivodeship 44-102, Poland
  • National Cancer Center ( Site 2406)
    Goyang-si, Kyonggi-do 10408, South Korea
  • Seoul National University Bundang Hospital ( Site 2409)
    Seongnam-si, Kyonggi-do 13605, South Korea
  • Ajou University Hospital ( Site 2407)
    Suwon, Kyonggi-do 16499, South Korea
  • Kyungpook National University Chilgok Hospital ( Site 2402)
    Daegu, Taegu-Kwangyokshi 41404, South Korea
  • Gachon University Gil Medical Center ( Site 2408)
    Incheon, 21565, South Korea
  • Seoul National University Hospital ( Site 2403)
    Seoul, 03080, South Korea
  • Severance Hospital Yonsei University Health System ( Site 2401)
    Seoul, 03722, South Korea
  • Asan Medical Center ( Site 2404)
    Seoul, 05505, South Korea
  • Samsung Medical Center ( Site 2405)
    Seoul, 06351, South Korea
  • Hospital Universitario Reina Sofia ( Site 0705)
    Córdoba, Andalusia 14004, Spain
  • Hospital General Arnau de Vilanova de Valencia ( Site 0706)
    Valencia, Valenciana, Comunitat 46015, Spain
  • Instituto Oncologico Baselga.Hospital Quiron. ( Site 0707)
    Barcelona, 08023, Spain
  • Hospital Universitari Vall d Hebron ( Site 0701)
    Barcelona, 08035, Spain
  • Hospital Clinic I Provincial de Barcelona ( Site 0702)
    Barcelona, 08036, Spain
  • Clinica Universitaria Navarra - Madrid ( Site 0700)
    Madrid, 28027, Spain
  • Kaohsiung Chang Gung Memorial Hospital ( Site 2304)
    Kaohsiung City, 83301, Taiwan

Showing the first 100 of 122 sites across 15 countries.

09

References and documents

Publications

  • Rugo HS, Cescon DW, Robson ME, Im SA, Dalenc F, Yanez Ruiz E, Reyes-Cosmelli F, Walshe JM, Im YH, Kulyk S, Dudnichenko O, Llinas-Quintero N, Saji S, Miyoshi Y, Bardia A, Harbeck N, Haiderali A, Fan L, Mejia JA, Karantza V, Llombart-Cussac A. KEYLYNK-009: Pembrolizumab plus Olaparib in Locally Recurrent Inoperable or Metastatic Triple-Negative Breast Cancer after Clinical Benefit from First-Line Pembrolizumab plus Chemotherapy. Clin Cancer Res. 2026 Mar 2;32(5):883-893. doi: 10.1158/1078-0432.CCR-25-1818. PubMed 41405563 ↗

Study documents

  • Protocol and statistical analysis plan · May 22, 2023

Documents are hosted by the registry — open the source record to download them.

Individual participant data

Plan to share: Yes — https://trialstransparency.msdclinicaltrials.com/pdf/ProcedureAccessClinicalTrialData.pdf

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Sep 14, 2026, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT04191135
Lead sponsor
Merck Sharp & Dohme LLC
Responsible party
Sponsor
First posted
Dec 9, 2019
Start date
Dec 19, 2019
Primary completion
Dec 15, 2022
Completion
Nov 26, 2025
Results posted
Feb 14, 2024
Last update
Sep 14, 2026

Study contacts

Medical Director
study director · Merck Sharp & Dohme LLC

Oversight

Data monitoring committee
No
FDA-regulated drug
Yes
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

Not currently enrolling

This study is terminated, as verified in Aug 2026. You cannot join it, but the record below documents what was studied.

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Discussion

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