Trial reportAnnals of internal medicine2023
Effectiveness of COVID-19 Treatment With Nirmatrelvir-Ritonavir or Molnupiravir Among U.S. Veterans: Target Trial Emulation Studies With One-Month and Six-Month Outcomes.
Trial report in Annals of internal medicine, 2023. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 64 papers, 7 of them syntheses that pooled it.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
64 citing papers in PubMed, 7 syntheses or guidelines pooled it, 93 citations in OpenAlex.
- Effectiveness of Nirmatrelvir/Ritonavir for Outpatients in the Era of Omicron, Vaccination, and Previous Infection: A Meta-analysis.Journal of general internal medicine · 2026Pooled it
- Real-world untreated risk of hospitalization and death in a nirmatrelvir/ritonavir treatment-eligible population with mild-to-moderate COVID-19 in the United States: a systematic literature review.BMC infectious diseases · 2026Pooled it
- Effectiveness of nirmatrelvir/ritonavir and molnupiravir in non-hospitalized adults with COVID-19: systematic review and meta-analysis of observational studies.The Journal of antimicrobial chemotherapy · 2024Pooled it
- Nirmatrelvir plus ritonavir remains effective in vaccinated patients at risk of progression with COVID-19: A systematic review and meta-analysis.Journal of global health · 2023Pooled it
- Pooled it
- Nirmatrelvir/Ritonavir Regimen for Mild/Moderately Severe COVID-19: A Rapid Review With Meta-Analysis and Trial Sequential Analysis.Annals of family medicinePooled it
- Effectiveness of Nirmatrelvir-Ritonavir for the Prevention of COVID-19-Related Hospitalization and Mortality: A Systematic Literature Review.American journal of therapeuticsPooled it
- Oseltamivir for Treatment of Influenza Among Outpatient Veterans: Target Trial Emulation.Open forum infectious diseases · 2026Trial
- Nirmatrelvir for Vaccinated or Unvaccinated Adult Outpatients with Covid-19.The New England journal of medicine · 2024Trial
- Antiviral efficacy of molnupiravir versus ritonavir-boosted nirmatrelvir in patients with early symptomatic COVID-19 (PLATCOV): an open-label, phase 2, randomised, controlled, adaptive trial.The Lancet. Infectious diseases · 2024Trial
- Development and Validation of an Electronic Health Record-Derived Prediction Model for Preventing COVID-19 Hospitalization and Death.Prevention science : the official journal of the Society for Prevention Research · 2026Article
- Evaluating the Effectiveness of Antivirals for COVID-19 in the Post-vaccine, Omicron Era: A Systematic Review and Meta-analysis.Open forum infectious diseases · 2026Article
- Effectiveness and safety of molnupiravir among patients with mild to moderate COVID-19: a prospective, observational, cohort study.Scientific reports · 2026Observational
- Paxlovid shows organ-specific and age-specific impacts on risk of developing post-acute sequelae of COVID-19.Communications medicine · 2026Article
- Effectiveness of nirmatrelvir/ritonavir and molnupiravir on post-COVID diabetes risk among an older adult cohort: a target trial emulation study.BMC medicine · 2026Article
- Design and Implementation of Observational Studies Emulating a Target Trial.JAMA network open · 2026Article
- Nirmatrelvir/Ritonavir Efficacy in Immunocompetent Patients with Confirmed Omicron Variant of Severe Acute Respiratory Syndrome Coronavirus 2: An Updated Systematic Review and Meta-analysis.Journal of research in pharmacy practice · 2026Review
- Effectiveness of nirmatrelvir/ritonavir and molnupiravir in reducing the risk of short-term and long-term cardiovascular complications of COVID-19: a target trial emulation study.Nature communications · 2025Article
- Effectiveness of nirmatrelvir/ritonavir and molnupiravir on post-COVID-19 outcomes among outpatients: a target trial emulation investigation.Emerging microbes & infections · 2025Observational
- Budget Impact of Adopting Nirmatrelvir-Ritonavir for Treating COVID-19 in a Large Integrated Healthcare System.Open forum infectious diseases · 2025Article
4 more citing papers are in PubMed but not listed here.
Corrections and comments
- Update of
Authors and funding
19 authors at 12 institutions in 1 country.
Funding
Abstract
backgroundInformation about the effectiveness of oral antivirals in preventing short- and long-term COVID-19-related outcomes in the setting of Omicron variant transmission and COVID-19 vaccination is limited.
objectiveTo measure the effectiveness of nirmatrelvir-ritonavir and molnupiravir for outpatient treatment of COVID-19.
designThree retrospective target trial emulation studies comparing matched cohorts of nirmatrelvir-ritonavir versus no treatment, molnupiravir versus no treatment, and nirmatrelvir-ritonavir versus molnupiravir.
settingVeterans Health Administration (VHA).
participantsNonhospitalized veterans in VHA care who were at risk for severe COVID-19 and tested positive for SARS-CoV-2 during January through July 2022.
interventionNirmatrelvir-ritonavir or molnupiravir pharmacotherapy. MEASUREMENTS: Incidence of any hospitalization or all-cause mortality at 30 days and from 31 to 180 days.
resultsEighty-seven percent of participants were male; the median age was 66 years, and 18% were unvaccinated. Compared with matched untreated control participants, those treated with nirmatrelvir-ritonavir ( LIMITATION: The date of COVID-19 symptom onset for most veterans was unknown.
conclusionNirmatrelvir-ritonavir was effective in reducing 30-day hospitalization and death. Molnupiravir was associated with a benefit for 30-day mortality but not hospitalization. Further reductions in mortality from 31 to 180 days were observed with both antivirals. PRIMARY FUNDING SOURCE: U.S. Department of Veterans Affairs.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.