Across rheumatic diseases

Outcomes of respiratory syncytial virus infection in patients with systemic autoimmune rheumatic disease

Semin Arthritis RheumPublished Retrospective cohort study

Authors' conclusion

This study highlights the increased risk of severe outcomes of RSV infection in individuals with SARDs. Factors associated with RSV hospitalization included frailty, higher comorbidity burden, and concurrent infection at the time of RSV.

Study context

Population
Individuals with systemic autoimmune rheumatic diseases (SARDs) and documented respiratory syncytial virus (RSV) infection, 2015–2023, Mass General Brigham (Boston, MA)mean age 68.5 years, 75.5% female
Participants
188 individuals
Outcome
Hospitalization for RSV infection (risk factors)
Methodological detailsmultivariable adjusted logistic regression, electronic health records
  • Multivariable adjusted logistic regression
  • Electronic health records

Main finding

As reported in the abstract

Hospitalization and factors associated with it
Hospitalized
96 (51.0%)
Higher Charlson Comorbidity Index, aOR per point
1.16 (95% CI 1.04-1.31)
Claims-Based Frailty Index, aOR vs robust/pre-frail
4.80 (95% CI 2.32-9.94)
Concurrent infection, aOR vs RSV alone
2.52 (95% CI 1.07-5.92)
CD20 inhibitor treatment, aOR vs csDMARD
3.84 (95% CI 0.99-15.20; numerically increased odds)
Older age, OR per year
1.03 (95% CI 1.01-1.05; numerically increased odds)

Observational data: associations, not effects.

Further findings

Oxygen required, among hospitalized

Required oxygen
56%

Deaths · within 90 days

Deaths
12
Of those hospitalized
12.5%
Of all with RSV
6%

Original publication

Outcomes of respiratory syncytial virus infection in patients with systemic autoimmune rheumatic disease. Semin Arthritis Rheum. Published 4 October 2025. doi:10.1016/j.semarthrit.2025.152846

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