COVID-19 in patients with autoimmune diseases: characteristics and outcomes in a multinational network of cohorts across three countries

Rheumatology (Oxford). 2021 Oct 9;60(SI):SI37-SI50. doi: 10.1093/rheumatology/keab250.

Abstract

Objective: Patients with autoimmune diseases were advised to shield to avoid coronavirus disease 2019 (COVID-19), but information on their prognosis is lacking. We characterized 30-day outcomes and mortality after hospitalization with COVID-19 among patients with prevalent autoimmune diseases, and compared outcomes after hospital admissions among similar patients with seasonal influenza.

Methods: A multinational network cohort study was conducted using electronic health records data from Columbia University Irving Medical Center [USA, Optum (USA), Department of Veterans Affairs (USA), Information System for Research in Primary Care-Hospitalization Linked Data (Spain) and claims data from IQVIA Open Claims (USA) and Health Insurance and Review Assessment (South Korea). All patients with prevalent autoimmune diseases, diagnosed and/or hospitalized between January and June 2020 with COVID-19, and similar patients hospitalized with influenza in 2017-18 were included. Outcomes were death and complications within 30 days of hospitalization.

Results: We studied 133 589 patients diagnosed and 48 418 hospitalized with COVID-19 with prevalent autoimmune diseases. Most patients were female, aged ≥50 years with previous comorbidities. The prevalence of hypertension (45.5-93.2%), chronic kidney disease (14.0-52.7%) and heart disease (29.0-83.8%) was higher in hospitalized vs diagnosed patients with COVID-19. Compared with 70 660 hospitalized with influenza, those admitted with COVID-19 had more respiratory complications including pneumonia and acute respiratory distress syndrome, and higher 30-day mortality (2.2-4.3% vs 6.32-24.6%).

Conclusion: Compared with influenza, COVID-19 is a more severe disease, leading to more complications and higher mortality.

Keywords: COVID-19; Observational Health Data Sciences and Informatics (OHDSI); Observational Medical Outcomes Partnership (OMOP); autoimmune condition; hospitalization; mortality; open science.

Publication types

  • Observational Study
  • Research Support, N.I.H., Extramural
  • Research Support, Non-U.S. Gov't
  • Research Support, U.S. Gov't, Non-P.H.S.

MeSH terms

  • Adult
  • Aged
  • Aged, 80 and over
  • Autoimmune Diseases / mortality*
  • Autoimmune Diseases / virology*
  • COVID-19 / immunology
  • COVID-19 / mortality*
  • Cohort Studies
  • Female
  • Hospitalization / statistics & numerical data*
  • Humans
  • Influenza, Human / immunology
  • Influenza, Human / mortality*
  • Male
  • Middle Aged
  • Prevalence
  • Prognosis
  • Republic of Korea / epidemiology
  • SARS-CoV-2
  • Spain / epidemiology
  • United States / epidemiology
  • Young Adult