Real-World Effectiveness of Nirmatrelvir/Ritonavir on Coronavirus Disease 2019-Associated Hospitalization Prevention : A Population-based Cohort Study in the Province of Quebec, Canada

© The Author(s) 2023. Published by Oxford University Press on behalf of Infectious Diseases Society of America. All rights reserved. For permissions, please e-mail: journals.permissionsoup.com..

BACKGROUND: Nirmatrelvir/ritonavir has shown to reduce COVID-19 hospitalization and death before Omicron, but updated real-world evidence studies are needed. This study aimed to assess whether nirmatrelvir/ritonavir reduces the risk of COVID-19-associated hospitalization among high-risk outpatients.

METHODS: A retrospective cohort study of outpatients with SARS-CoV-2 between March 15 and 15 October 2022, using data from the Quebec clinico-administrative databases. Outpatients treated with nirmatrelvir/ritonavir were compared with infected ones not receiving nirmatrelvir/ritonavir using propensity-score matching. Relative risk (RR) of COVID-19-associated hospitalization within 30 days was assessed using a Poisson regression.

RESULTS: A total of 8402 treated outpatients were matched to controls. Regardless of vaccination status, nirmatrelvir/ritonavir treatment was associated with a 69% reduced RR of hospitalization (RR: .31; 95% CI: .28; .36; number needed to treat [NNT] = 13). The effect was more pronounced in outpatients with incomplete primary vaccination (RR: .04; 95% CI: .03; .06; NNT = 8), while no benefit was found in those with a complete primary vaccination (RR: .93; 95% CI: .78; 1.08). Subgroups analysis among high-risk outpatients with a complete primary vaccination showed that nirmatrelvir/ritonavir treatment was associated with a significant decrease in the RR of hospitalization in severely immunocompromised outpatients (RR: .66; 95% CI: .50; .89; NNT = 16) and in high-risk outpatients aged ≥70 years (RR: .50; 95% CI: .34; .74; NNT = 10) when the last dose of the vaccine was received at least 6 months ago.

CONCLUSIONS: Nirmatrelvir/ritonavir reduces the risk of COVID-19-associated hospitalization among incompletely vaccinated high-risk outpatients and among some subgroups of completely vaccinated high-risk outpatients.

Medienart:

E-Artikel

Erscheinungsjahr:

2023

Erschienen:

2023

Enthalten in:

Zur Gesamtaufnahme - volume:77

Enthalten in:

Clinical infectious diseases : an official publication of the Infectious Diseases Society of America - 77(2023), 6 vom: 18. Sept., Seite 805-815

Sprache:

Englisch

Beteiligte Personen:

Kaboré, Jean-Luc [VerfasserIn]
Laffont, Benoît [VerfasserIn]
Diop, Mamadou [VerfasserIn]
Tardif, Melanie R [VerfasserIn]
Turgeon, Alexis F [VerfasserIn]
Dumaresq, Jeannot [VerfasserIn]
Luong, Me-Linh [VerfasserIn]
Cauchon, Michel [VerfasserIn]
Chapdelaine, Hugo [VerfasserIn]
Claveau, David [VerfasserIn]
Brosseau, Marc [VerfasserIn]
Haddad, Elie [VerfasserIn]
Benigeri, Mike [VerfasserIn]

Links:

Volltext

Themen:

7R9A5P7H32
Antiviral Agents
COVID-19
Effectiveness
Journal Article
Nirmatrelvir
O3J8G9O825
Research Support, Non-U.S. Gov't
Ritonavir
SARS-CoV-2

Anmerkungen:

Date Completed 20.09.2023

Date Revised 20.09.2023

published: Print

Citation Status MEDLINE

doi:

10.1093/cid/ciad287

funding:

Förderinstitution / Projekttitel:

PPN (Katalog-ID):

NLM356528863