A Phase 3 interventional study of Active Comparator: Olaparib tablets and Placebo in Epithelial Ovarian Cancer, sponsored by AstraZeneca. Completed at 82 sites in 11 countries. Open to female participants aged 18 Years to 130 Years. Per ClinicalTrials.gov, last updated 2022-10-07.
Sponsored by AstraZeneca · Phase 3, Interventional, and Treatment
The OReO study will be a Phase IIIb, randomised, double-blind, placebo-controlled, multicentre study to assess the efficacy and tolerability of Olaparib retreatment, versus matching placebo, in non-mucinous epithelial ovarian cancer (EOC) patients (including patients with primary peritoneal and/or fallopian tube cancer)
The OReO study will investigate the efficacy and safety of Olaparib maintenance re-treatment in patients with relapsed non-mucinous EOC, who have had disease progression following maintenance therapy with a Polyadenosine 5'diphosphoribose [poly (ADP ribose)] polymerisation inhibitor (PARPi) and a complete or partial radiological response to subsequent treatment with platinum-based chemotherapy or may have no evidence of disease (if optimal cytoreductive surgery was conducted prior to chemotherapy), and no evidence of a rising CA-125. Patients will be enrolled on the basis of their breast cancer susceptibility gene (BRCA1, BRCA2) status into one of two cohorts (BRCA1/2 [+ve] and BRCA1/2 [-ve]). The BRCA1/2 (+ve) and BRCA1/2 (-ve) cohorts will be randomised separately. Within each cohort, patients will be randomised by prospective allocation in a 2:1 ratio (Olaparib: matching placebo).
2,695 studies on the registry are indexed under Ovarian Neoplasms; 727 are open to participants now.
This study's enrollment of 220 is above the median of 60 across 2,030 interventional studies indexed under Ovarian Neoplasms.
Browse Ovarian Neoplasms studies →AstraZeneca is the lead sponsor of 3,429 studies on the registry; 270 are open to participants now.
Of its 357 completed or terminated interventional studies of FDA-regulated products, 173 (48%) have results posted.
Counted across the registry records on this site, refreshed daily.
Patients must not have received bevacizumab during this course of treatment. Bevacizumab use as part of an earlier line of chemotherapy is permitted Patients must not have received any investigational agent during this course of treatment Patients must be randomised within 8 weeks of their last dose of chemotherapy (last dose is the day of the last infusion)
Exclusion criteria:
Olaparib 300mg tablets administered orally twice daily continuously.
Drug: Active Comparator: Olaparib tablets
Matching placebo 300mg tablets administered orally twice daily continuously.
Drug: Placebo
Olaparib 300mg Olaparib tablets taken orally twice daily (except where this dose and formulation was previously not tolerated) until objective radiological disease progression as per RECIST 1.1 or as long as in the Investigator's opinion they are benefiting from treatment and they do not meet any other discontinuation criteria.
Also known as: Olaparib tablets
Placebo 300mg placebo tablets taken orally twice daily (except where this dose and formulation was previously not tolerated) until objective radiological disease progression as per RECIST 1.1 or as long as in the Investigator's opinion they are benefiting from treatment and they do not meet any other discontinuation criteria.
Efficacy: Progression-free Survival (PFS)
PFS (per RECIST 1.1) was defined as the time from randomisation until the date of Investigator assessed objective radiological disease progression or death (by any cause in the absence of disease progression). Objective progression (per RECIST 1.1) is defined as at least a 20% increase in the sum of the diameters of the target lesions and an absolute increase of \>5 mm, or an overall non-target lesion assessment of progression or a new lesion. Patients who have not progressed or died at the time of analysis were censored at the time of the latest date of assessment from their last evaluable RECIST assessment.
Time frame: At randomization visit and at every 12 weeks (+/- 7 days) until objective radiological disease progression as determined by the investigator or other discontinuation criteria are met (assessed upto 3.8 years)
Efficacy: Overall Survival (OS)
OS was defined as the time from the date of randomisation until death due to any cause. Any patient not known to have died at the time of analysis was censored based on the last recorded date on which the patient was known to be alive
Time frame: From randomisation till Long-term follow-up (12-weekly beyond 30 days after last dose of study treatment) assessed upto 3.8 years
Efficacy: Time to Progression by Gynecologic Cancer Intergroup (GCIG) Criteria
Time to progression by RECIST or CA-125 or death is defined as the time from randomisation to the earlier date of RECIST progression or CA-125 progression or death by any cause. Patients without a CA-125 progression or a RECIST progression who are still alive at the time of analysis will be censored at the time of their last evaluable RECIST assessment and/or their last available CA-125 measurement, whichever is the earliest at the time of analysis. Patients that do not have any evaluable RECIST assessments or any CA-125 results post-randomisation will be censored at the date of randomisation
Time frame: At screening (Visit 1) and at every 12 weeks (±7 days), until objective disease progression, based on progressive serial elevation of serum CA-125 according to the GCIG criteria, or until discontinuation for other reasons (assessed upto 3.8 years)
Efficacy: Time to First Subsequent Treatment Commencement (TFST)
TFST was assessed as time from randomisation to first subsequent treatment commencement or death if this occurs before commencement of first subsequent treatment. Any patient not known to have had a further subsequent therapy or death was censored at the last known time to have not received subsequent therapy
Time frame: From follow-up i.e. 30 days after last dose of study medication till end of study (assessed every 12 weeks upto 3.8 years)
Efficacy: Time to Second Subsequent Treatment Commencement (TSST)
TSST was assessed as time from randomisation to second subsequent treatment commencement or death if this occurs before commencement of second subsequent treatment. Any patient not known to have had a further second subsequent therapy or death was censored at the last known time to have not received second subsequent therapy
Time frame: From follow-up i.e. 30 days after last dose of study medication till end of study (assessed every 12 weeks upto 3.8 years)
Efficacy: Time to Study Treatment Discontinuation (TDT)
TDT was assessed as time from randomisation to study treatment discontinuation or death if this occurs before discontinuation of study treatment. Any patient not known to have died at the time of analysis and not known to have discontinued study treatment was censored based on the last recorded date on which the patient was known to be alive
Time frame: From follow-up 30 days after last dose of study medication till long-term follow-up i.e. 12-weekly beyond 30 days after last dose of study treatment
Efficacy: Change From Baseline in Health-related Quality of Life (HRQoL)
Health related quality of life (HRQoL) of Olaparib maintenance retreatment compared to placebo as measured by the Functional Assessment of Cancer Therapy - Ovarian (FACT-O) Trial Outcome Index (TOI) was determined. HRQoL was analysed using the FACT-O tool by mixed model for repeated measures (MMRM) analysis of the change from baseline in TOI score. FACT-O TOI is scored from O to 100 with higher scores denoting better quality of life. The higher the score, the better the HRQoL.
Time frame: At Baseline, and from Day 1 until objective disease progression (assessed upto 2 years)
Number of Patients With Adverse Events (AEs), and Serious Adverse Events (SAEs)
All AEs/serious adverse events (SAEs) reported during the study were recorded.
Time frame: At Baseline and from Day 1 till follow-up i.e. 30 days after last dose of study medication (assessed upto 3.8 years)
Number of Patients With Adverse Event of Special Interest (AESI).
All AESIs reported during the study were recorded.
Time frame: At Baseline and from Day 1 till long-term follow-up i.e. 12-weekly beyond 30 days after last dose of study treatment (assessed upto 3.8 years)
This study was conducted at study centres in 11 countries (France, Italy, Spain, Germany, Poland, Belgium, Denmark, Israel, United Kingdom, Norway, and Canada) between 8-Jun-2017 and 15-Feb-2021.
| Milestone | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Started | 74 | 38 | 72 | 36 |
| Completed | 30 | 15 | 54 | 25 |
| Not completed | 44 | 23 | 18 | 11 |
| Withdrew: Death | 37 | 22 | 12 | 8 |
| Withdrew: Lost to follow-up | 2 | 0 | 2 | 2 |
| Withdrew: Withdrawal by subject | 5 | 1 | 4 | 1 |
PFS (per RECIST 1.1) was defined as the time from randomisation until the date of Investigator assessed objective radiological disease progression or death (by any cause in the absence of disease progression). Objective progression (per RECIST 1.1) is defined as at least a 20% increase in the sum of the diameters of the target lesions and an absolute increase of \>5 mm, or an overall non-target lesion assessment of progression or a new lesion. Patients who have not progressed or died at the time of analysis were censored at the time of the latest date of assessment from their last evaluable RECIST assessment.
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Progression-free Survival (PFS) | 4.3 (2.79 to 5.49) | 2.8 (2.73 to 4.96) | 5.3 (2.89 to 5.55) | 2.8 (2.79 to 2.89) |
OS was defined as the time from the date of randomisation until death due to any cause. Any patient not known to have died at the time of analysis was censored based on the last recorded date on which the patient was known to be alive
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Overall Survival (OS) | 20.1 (16.39 to 25.43) | 20.9 (15.21 to 23.92) | 23.2 (15.15 to NA) | 30.2 (17.84 to NA) |
Time to progression by RECIST or CA-125 or death is defined as the time from randomisation to the earlier date of RECIST progression or CA-125 progression or death by any cause. Patients without a CA-125 progression or a RECIST progression who are still alive at the time of analysis will be censored at the time of their last evaluable RECIST assessment and/or their last available CA-125 measurement, whichever is the earliest at the time of analysis. Patients that do not have any evaluable RECIST assessments or any CA-125 results post-randomisation will be censored at the date of randomisation
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Time to Progression by Gynecologic Cancer Intergroup (GCIG) Criteria | 2.8 (2.76 to 5.36) | 2.8 (2.73 to 3.98) | 2.9 (2.79 to 5.32) | 2.79 (2.63 to 2.79) |
TFST was assessed as time from randomisation to first subsequent treatment commencement or death if this occurs before commencement of first subsequent treatment. Any patient not known to have had a further subsequent therapy or death was censored at the last known time to have not received subsequent therapy
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Time to First Subsequent Treatment Commencement (TFST) | 5.8 (4.67 to 9.17) | 5.1 (3.58 to 6.11) | 7.9 (5.88 to 11.07) | 4.3 (3.68 to 6.41) |
TSST was assessed as time from randomisation to second subsequent treatment commencement or death if this occurs before commencement of second subsequent treatment. Any patient not known to have had a further second subsequent therapy or death was censored at the last known time to have not received second subsequent therapy
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Time to Second Subsequent Treatment Commencement (TSST) | 13.1 (11.10 to 15.64) | 11.7 (8.61 to 13.60) | 15.4 (11.60 to 23.62) | 12.7 (10.35 to 16.62) |
TDT was assessed as time from randomisation to study treatment discontinuation or death if this occurs before discontinuation of study treatment. Any patient not known to have died at the time of analysis and not known to have discontinued study treatment was censored based on the last recorded date on which the patient was known to be alive
| Months | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Time to Study Treatment Discontinuation (TDT) | 4.5 (3.35 to 5.59) | 3.4 (2.86 to 5.49) | 5.6 (3.42 to 5.78) | 3.1 (2.79 to 3.91) |
Health related quality of life (HRQoL) of Olaparib maintenance retreatment compared to placebo as measured by the Functional Assessment of Cancer Therapy - Ovarian (FACT-O) Trial Outcome Index (TOI) was determined. HRQoL was analysed using the FACT-O tool by mixed model for repeated measures (MMRM) analysis of the change from baseline in TOI score. FACT-O TOI is scored from O to 100 with higher scores denoting better quality of life. The higher the score, the better the HRQoL.
| Change in scores | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Efficacy: Change From Baseline in Health-related Quality of Life (HRQoL) | -1.27 ± 0.55 | 1.67 ± 0.89 | -2.08 ± 0.60 | 0.58 ± 0.90 |
All AEs/serious adverse events (SAEs) reported during the study were recorded.
| Participants | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Any Treatment emergent adverse event (TEAE) | 64 | 33 | 66 | 31 |
| Any TEAE causally related to treatment | 50 | 23 | 53 | 14 |
| Any TEAE of Common Terminology Criteria for Adverse Events (CTCAE) grade 3 or higher | 11 | 2 | 15 | 3 |
| Any TEAE of CTCAE grade 3 or higher, causally related to treatment | 5 | 1 | 5 | 1 |
| Any TEAE with outcome = death | 0 | 0 | 0 | 0 |
| Any TEAE with outcome = death, causally related to treatment | 0 | 0 | 0 | 0 |
| Any treatment-emergent SAE (including events with outcome = death) | 5 | 0 | 11 | 2 |
| Any treatment-emergent SAE (including events with outcome = death), causally related to treatment | 1 | 0 | 3 | 0 |
| Any TEAE leading to discontinuation of study medication | 2 | 0 | 1 | 0 |
| Any TEAE leading to discontinuation of study medication, causally related to treatment | 1 | 0 | 0 | 0 |
| Any TEAE leading to dose modification | 18 | 6 | 28 | 2 |
| Any TEAE leading to dose modification, causally related to treatment | 14 | 5 | 21 | 1 |
All AESIs reported during the study were recorded.
| Participants | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Number of Patients With Adverse Event of Special Interest (AESI). | 1 | 1 | 1 | 0 |
Collected over From Screening (Day -27 to Day 0) up to 12-weekly beyond 30 days after the last dose of study treatment (assessed up to 3.8 years). Non-serious events are listed at a 0% frequency threshold.
| Group | Deaths | Serious | Other |
|---|---|---|---|
| Olaparib (BRCA1/2 +ve) | 39/74 (52.7%) | 5/74 (6.8%) | 64/74 (86.5%) |
| Placebo (BRCA1/2 +ve) | 22/38 (57.9%) | 0/38 (0%) | 33/38 (86.8%) |
| Olaparib (BRCA1/2 -ve) | 15/72 (20.8%) | 11/72 (15.3%) | 65/72 (90.3%) |
| Placebo (BRCA1/2 -ve) | 8/36 (22.2%) | 2/36 (5.6%) | 30/36 (83.3%) |
| Event | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| Incarcerated herniaGeneral disorders | 0/74 | 0/38 | 0/72 | 1/36 |
| Hepatic haematomaHepatobiliary disorders | 0/74 | 0/38 | 0/72 | 1/36 |
| COVID-19 pneumoniaInfections and infestations | 2/74 | 0/38 | 0/72 | 0/36 |
| AnaemiaBlood and lymphatic system disorders | 1/74 | 0/38 | 1/72 | 0/36 |
| NeutropeniaBlood and lymphatic system disorders | 1/74 | 0/38 | 1/72 | 0/36 |
| Febrile neutropeniaBlood and lymphatic system disorders | 0/74 | 0/38 | 1/72 | 0/36 |
| Supraventricular tachycardiaCardiac disorders | 0/74 | 0/38 | 1/72 | 0/36 |
| DiverticulumGastrointestinal disorders | 0/74 | 0/38 | 1/72 | 0/36 |
| Ileal perforationGastrointestinal disorders | 0/74 | 0/38 | 1/72 | 0/36 |
| IleusGastrointestinal disorders | 0/74 | 0/38 | 1/72 | 0/36 |
| Event | Olaparib (BRCA1/2 +ve) | Placebo (BRCA1/2 +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA1/2 -ve) |
|---|---|---|---|---|
| NauseaGastrointestinal disorders | 29/74 | 4/38 | 30/72 | 3/36 |
| Abdominal painGastrointestinal disorders | 8/74 | 11/38 | 6/72 | 6/36 |
| AstheniaGeneral disorders | 18/74 | 3/38 | 15/72 | 2/36 |
| AnaemiaBlood and lymphatic system disorders | 13/74 | 2/38 | 15/72 | 1/36 |
| FatigueGeneral disorders | 13/74 | 5/38 | 13/72 | 2/36 |
| DiarrhoeaGastrointestinal disorders | 10/74 | 5/38 | 12/72 | 2/36 |
| ConstipationGastrointestinal disorders | 9/74 | 6/38 | 9/72 | 2/36 |
| NeutropeniaBlood and lymphatic system disorders | 4/74 | 4/38 | 8/72 | 3/36 |
| ArthralgiaMusculoskeletal and connective tissue disorders | 0/74 | 3/38 | 2/72 | 4/36 |
| VomitingGastrointestinal disorders | 8/74 | 4/38 | 6/72 | 1/36 |
Full analysis set (FAS) consisted of all randomised patients analysed on an intent-to-treat (ITT) basis.
| Age, Continuous(Years) | Olaparib (BRCA1/2 +ve) | Placebo (BRCA +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA 1/2 -ve) | Total |
|---|---|---|---|---|---|
| Mean | 59.2 ± 9.31 | 61.5 ± 9.22 | 64.2 ± 9.64 | 63.3 ± 9.05 | 61.9 ± 9.54 |
| Age, Customized(Participants) | Olaparib (BRCA1/2 +ve) | Placebo (BRCA +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA 1/2 -ve) | Total |
|---|---|---|---|---|---|
| < 50 | 11 | 3 | 4 | 1 | 19 |
| ≥ 50 to < 65 | 40 | 20 | 29 | 19 | 108 |
| ≥ 65 to < 75 | 20 | 12 | 30 | 11 | 73 |
| ≥ 75 | 3 | 3 | 9 | 5 | 20 |
| Sex: Female, Male(Participants) | Olaparib (BRCA1/2 +ve) | Placebo (BRCA +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA 1/2 -ve) | Total |
|---|---|---|---|---|---|
| Female | 74 | 38 | 72 | 36 | 220 |
| Male | 0 | 0 | 0 | 0 | 0 |
| Race/Ethnicity, Customized(Participants) | Olaparib (BRCA1/2 +ve) | Placebo (BRCA +ve) | Olaparib (BRCA1/2 -ve) | Placebo (BRCA 1/2 -ve) | Total |
|---|---|---|---|---|---|
| White | 71 | 35 | 66 | 33 | 205 |
| American Indian or Alaska Native | 0 | 0 | 0 | 0 | 0 |
| Asian | 0 | 0 | 0 | 0 | 0 |
| Black or African American | 0 | 0 | 1 | 0 | 1 |
| Hawaiian Native or Other Pacific Islander | 0 | 0 | 0 | 0 | 0 |
| Other | 3 | 3 | 5 | 2 | 13 |
| Missing Data | 0 | 0 | 0 | 1 | 1 |
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Plan to share: Yes — Qualified researchers can request access to anonymized individual patient-level data from AstraZeneca group of companies sponsored clinical trials via the request portal. All request will be evaluated as per the AZ disclosure commitment: https://astrazenecagrouptrials.pharmacm.com/ST/Submission/Disclosure.
Supporting information: Study protocol, Sap
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