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CompletedNCT05013723MAbPACsUpdated Nov 7, 2024

Impact of Monoclonal Antibody Treatment on Post-Acute COVID-19 Syndrome

An observational study in Post-acute COVID-19 (PACS), or "long COVID" Syndrome, sponsored by Intermountain Health Care, Inc.. Completed at 1 site in United States. Open to participants aged 18 Years and older. Per ClinicalTrials.gov, last updated 2024-11-07.

Sponsored by Intermountain Health Care, Inc. · Observational

Study type
Observational
Model
Case-control
Time perspective
Retrospective
Enrollment
260
Ages
18 Years and older
Sex
All
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Study summary

Use the Intermountain real-world MAb-treatment registry and control group to prospectively evaluate PACS symptoms at least 60 days after initial COVID-19 diagnosis.

Read the detailed description

It is now recognized that many patients who develop symptomatic COVID-19 infection continue to suffer from a variety of symptoms that persist well after the acute syndrome. This has been called post-acute COVID-19 (PACS), or "long COVID" syndrome. In a meta-analysis of studies of hospitalized patients, 70% of patients reported PACS symptoms 60 days after diagnosis. Patients with non-severe COVID-19 appear to have lower rates of PACS symptoms, although a recent study suggested that at 4 months follow-up, 28% of patients still reported at least one symptom. PACS is associated with significant morbidity, decreased quality of life, mental and behavioral health impact and healthcare cost. Neither the pathophysiology nor risk factors for PACS are well-understood and further research is needed to characterize this syndrome. Some studies have suggested that age, female gender, obesity, comorbid burden, symptoms at diagnosis and hospitalization during acute COVID-19 increase risk for PACS. Because of the significant overall impact of PACS, there is significant interest in identifying therapies to prevent this condition. Early neutralizing therapy with anti-SARS-CoV-2 monoclonal antibodies (MAbs) addresses the initial phase of disease and has now been shown to be effective at decreasing viral load and preventing progression to severe disease, hospitalization and death.

Understanding how MAb therapy may impact PACS symptoms is important to determining usage and value of these products and an important contribution to our understanding of how to prevent PACS.

Study Design: Prospective electronic survey using matched case-control design

Objective: Use the Intermountain real-world MAb-treatment registry and control group to prospectively evaluate PACS symptoms at least 60 days after initial COVID-19 diagnosis. Aim 1: Determine whether ambulatory patients who received monoclonal antibody infusion for early symptomatic COVID-19 have fewer persistent symptoms of post-acute COVID-19 ("long COVID") syndrome at least 60 days after initial diagnosis.

Hypothesis: MAb therapy is associated with significantly less post-acute COVID-19 (PACS) symptoms at 120 days post diagnosis Aim 2: Explore predictors associated with PACS symptoms in high risk patients Hypothesis: Hospitalization, age, obesity, number of comorbidities and symptoms at diagnosis predict PACS

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Conditions studied

  • Post-acute COVID-19 (PACS), or "long COVID" Syndrome
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In context

COVID-19

7,640 studies on the registry are indexed under COVID-19; 488 are open to participants now.

This study's enrollment of 260 is close to the median of 261 across 3,136 observational studies indexed under COVID-19.

Browse COVID-19 studies →

Lead sponsor

Intermountain Health Care, Inc. is the lead sponsor of 118 studies on the registry; 15 are open to participants now.

Of its 9 completed or terminated interventional studies of FDA-regulated products, 3 (33%) have results posted.

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

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Who can participate

Ages eligible
18 Years and older
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Adult patients with laboratory-confirmed acute COVID-19 in the Intermountain MAb registry, assessed at least 60 after positive test date but no greater than 90 days

Inclusion criteria

  • Age ≥18
  • Positive antigen or polymerase chain reaction test for SARS-CoV-2
  • Symptomatic COVID-19
  • Between day 60 and day 90 from date of positive test
  • Not hospitalized or hypoxemic by day 7 of symptoms (Aim 1 only)

Exclusion criteria

Exclusion Criteria:

  • Unwilling to participate
  • Not able to understand the English language survey questions
  • Prisoners
  • Inadequate cognitive capacity to provide consent and complete the survey
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Study design

Observational model
Case-control
Time perspective
Retrospective
Enrollment
260 participants (actual)
Patient registry
No

Groups and cohorts

  • Intervention

    Patients who received casirivimab-imdevimab antibody infusion

    Other: Surveys

  • Control

    Matched control group who did not receive MAb, matched on diagnosis date, age, gender and Utah COVID-19 Risk Score

    Other: Surveys

Interventions

  • OtherSurveys

    Mental health validated psychometric surveys: Depression (PHQ-9), Anxiety (GAD-7), PTSD (PC-PTSD-5) Quality of Life surveys: Post COVID-19 Function Status Scale, Quality of life (SF-12)

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What researchers measure

Primary outcomes

  1. Post-acute COVID-19 symptom score (out of 60)

    Post-acute COVID-19 symptom score (out of 60)

    Time frame: Between day 60 and day 90 from date of positive test

Secondary outcomes

  1. Medically attended visits

    Number of medically attended visits between day 60 and day 90 from date of positive test

    Time frame: Between day 60 and day 90 from date of positive test

  2. Healthcare costs

    Total healthcare costs to health system

    Time frame: Between day 60 and day 90 from date of positive test

  3. Diagnostic test costs

    Total diagnostic test costs to health system

    Time frame: Between day 60 and day 90 from date of positive test

  4. Mental health validated psychometric surveys: Depression (PHQ-9),PTSD (PC-PTSD-5)

    Depression (PHQ-9) score. Range (0-27). Lower scores indicate better health

    Time frame: Between day 60 and day 19 from date of positive test

  5. Post COVID-19 Function Status Scale

    Quality of Life surveys: Post COVID-19 Function Status Scale. Range (0-4), lower score indicates better health

    Time frame: Between day 60 and day 90 from date of positive test

  6. Mental health validated psychometric survey: Anxiety (GAD-7)

    Anxiety (GAD-7) score (Range 0 -21). Lower scores indicate better health

    Time frame: Between day 60 and day 90 from date of positive test

  7. Quality of life (SF-12)

    SF-12 Short Form 12. Range (0-64), high scores indicate better health

    Time frame: Between day 60 and day 90 from date of positive test

  8. Primary Care Post-Traumatic Stress Disorder 5

    PTSD-5. Range (0-5); lower scores indicate better health

    Time frame: Between day 60 and day 90 from date of positive test

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Study locations

1 site
  • Intermountain Medical Center
    Murray, Utah 84157, United States
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References and documents

Individual participant data

Plan to share: No

No publications or documents are linked to this record.

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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Nov 7, 2024, 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
NCT05013723
Lead sponsor
Intermountain Health Care, Inc.
Collaborators
Regeneron Pharmaceuticals
Responsible party
Sponsor
First posted
Aug 19, 2021
Start date
Aug 30, 2021
Primary completion
Dec 16, 2022
Completion
Dec 16, 2022
Last update
Nov 7, 2024

Oversight

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

Not currently enrolling

This study is completed, as verified in Nov 2024. You cannot join it, but the record below documents what was studied.

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