Association between previous rheumatoid arthritis and COVID-19 and its severity: a nationwide cohort study in South Korea.

ABSTRACT:

Objectives

The prevalence of rheumatoid arthritis (RA) among patients with COVID-19 and the association between RA and the outcome of COVID-19 remain unclear. We aimed to compare the prevalence of RA between participants with and without COVID-19; we then analysed the association between the presence of RA and the severity of COVID-19.

Design

A cross-sectional study.

Setting

Data from a nationwide COVID-19 cohort database by the Korea National Health Insurance Corporation were used.

Participants and interventions

A total of 8070 patients with COVID-19 (1 January 2020 through 4 June 2020) were matched with 32 280 control participants with regard to age, sex and income. Patients with COVID-19 were confirmed by SARS-CoV-2 PCR and controls were collected from the d

SUBMITTER: Jung Y 

PROVIDER: S-EPMC8507409 | biostudies-literature | 2021 Oct

REPOSITORIES: biostudies-literature