Dataset Information

The association between anticoagulation and adverse outcomes after a positive SARS-CoV-2 test among older outpatients: A population-based cohort study.

ABSTRACT:

Introduction

Anticoagulation may improve outcomes in patients with COVID-19 when started early in the course of illness.

Materials and methods

This was a population-based cohort study using linked administrative datasets of outpatients aged ≥65 years old testing positive for SARS-CoV-2 between January 1 and December 31, 2020 in Ontario, Canada. The key exposure was anticoagulation with warfarin or direct oral anticoagulants before COVID-19 diagnosis. We calculated propensity scores and used matching weights (MWs) to reduce baseline differences between anticoagulated and non-anticoagulated patients. The primary outcome was a composite of death or hospitalization within 60 days of a positive SARS-CoV-2 test. We used the Kaplan-Meier method and cumulative incidence functions to estimate risk of the primary and component outcomes at 60 days.

Results

We studied 23,159 outpatients (mean age 78.5 years; 13,474 [58.2%] female), among whom 3200 (13.8%) deaths and 3183 (13.7%) hospitalizations occurred within 60 days of the SARS-CoV-2 test. After application of MWs, the 60-day risk of death or hospitalization was 29.2% (95% CI 27.4%-31.2%) for anticoagulated individuals and 32.1% (95% CI 30.7%-33.5%) without anticoagulation (absolute risk difference [ARD], -2.9%; p = 0.005). Anticoagulation was also associated with a lower risk of death: 18.6% (95% CI 17.0%-20.2%) with anticoagulation and 20.9% (95% CI 19.7%-22.2%) in non-anticoagulated patients (ARD -2.3%; p = 0.005).

Conclusions

Among outpatients aged ≥65 years, oral anticoagulation at the time of a positive SARS-CoV-2 test was associated with a lower risk of a composite of death or hospitalization within 60 days.

SUBMITTER: Abdel-Qadir H

PROVIDER: S-EPMC8667561 | biostudies-literature | 2022 Mar

REPOSITORIES: biostudies-literature

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Publications

The association between anticoagulation and adverse outcomes after a positive SARS-CoV-2 test among older outpatients: A population-based cohort study.

Abdel-Qadir Husam H Austin Peter C PC Pang Andrea A Fang Jiming J Udell Jacob A JA Geerts William H WH McNaughton Candace D CD Jackevicius Cynthia A CA Kwong Jeffrey C JC Yeh Calvin H CH Cox Jafna L JL Lee Douglas S DS Ko Dennis T DT Atzema Clare L CL

Thrombosis research 20211213

<h4>Introduction</h4>Anticoagulation may improve outcomes in patients with COVID-19 when started early in the course of illness.<h4>Materials and methods</h4>This was a population-based cohort study using linked administrative datasets of outpatients aged ≥65 years old testing positive for SARS-CoV-2 between January 1 and December 31, 2020 in Ontario, Canada. The key exposure was anticoagulation with warfarin or direct oral anticoagulants before COVID-19 diagnosis. We calculated propensity score ...[more]

PMID: 35149396

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Dataset Information

The association between anticoagulation and adverse outcomes after a positive SARS-CoV-2 test among older outpatients: A population-based cohort study.

Introduction

Materials and methods

Results

Conclusions

Publications

The association between anticoagulation and adverse outcomes after a positive SARS-CoV-2 test among older outpatients: A population-based cohort study.

Similar Datasets

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