Rheumatoid arthritis

Effectiveness of Janus kinase (JAK) inhibitors in biologics-naïve patients with RA: a population-based study

Rheumatology (Oxford)Published Retrospective cohort study

Main finding · Treatment changeResult — go to the resultHazard ratio 1.38 95% CI 1.25–1.53

Authors' conclusion

We found JAK inhibitors had better effectiveness than TNFi biologics, with no significant difference compared with non-TNFi biologics in biologics-naïve patients.

Study context

Population
Biologics-naïve RA patients, Taiwan's National Health Insurance Research Database
Participants
16,212 patients
Exposure
JAK inhibitors vs TNF inhibitor (TNFi) biologics and non-TNFi biologics in biologics-naïve RA
  • JAK inhibitorsn = 2,654reference
  • TNFi biologicsn = 10,080
  • Non-TNFi biologicsn = 3,478
Outcome
Treatment change (discontinuation or switching of medications) as measure of drug retention
Follow-up
2-year study period
Methodological detailspopulation-based, Taiwan's National Health Insurance Research Database
  • Population-based
  • Taiwan's National Health Insurance Research Database

Main finding

Treatment change

Hazard ratio

1.38

95% CI 1.25–1.53

TNFi biologicsvs JAK inhibitors
HR 1.38 (95% CI 1.25–1.53)

As reported in the abstract

Observational data: associations, not effects.

Further findings

Treatment change, intra-class JAK inhibitors (tofacitinib vs baricitinib)

Risk of treatment change among JAK inhibitors (tofacitinib, baricitinib) similar

Original publication

Effectiveness of JAK inhibitors in biologics-naïve patients with RA: a population-based study. Rheumatology (Oxford). Published 18 April 2025. doi:10.1093/rheumatology/keaf216

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