Rheumatoid arthritis

Glucocorticoid exposure and the risk of serious infections in rheumatoid arthritis: a marginal structural model application

Rheumatology (Oxford)Published Prospective inception cohort study

Authors' conclusion

Our results broadly agree with previous observational studies showing a dose dependent increased risk of infection associated with (recent) use of oral glucocorticoids.

Study context

Population
Newly diagnosed RA patients from the Swedish Rheumatology Quality Register, 2007–2018, followed for 3 years after the first rheumatology visit
Participants
9,654 participants
Exposure
Oral GC dose patterns vs no GC use
Outcome
Incidence of serious infections (hospitalisation for infection)
Follow-up
3 years
Methodological detailsmarginal structural models, pooled logistic regression, adjusted for time-varying confounders, register-based (Swedish Rheumatology Quality Register)
  • Marginal structural models
  • Pooled logistic regression
  • Adjusted for time-varying confounders
  • Register-based (Swedish Rheumatology Quality Register)

Main finding

As reported in the abstract

Serious infections

NNH

83

Low · low GC doses for the first 6 months; one additional serious infection per 83 treated

NNH

125

High · high GC doses for the first 3 months; one additional serious infection per 125 treated

Observational data: associations, not effects.

Original publication

Glucocorticoid exposure and the risk of serious infections in rheumatoid arthritis: a marginal structural model application. Rheumatology (Oxford). Published 23 February 2023. doi:10.1093/rheumatology/kead083

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