Rheumatoid arthritis

Real-world effectiveness, safety and patient-reported outcomes of sarilumab in patients with rheumatoid arthritis: a 52-week, prospective, open-label, non-interventional, observational, nationwide, large-cohort study in Japan (PROFILE-J)

RMD OpenPublished Prospective observational cohort study

Authors' conclusion

This study described real-world treatment patterns of sarilumab, highlighting frequent initiation in biologic DMARD-naïve patients, particularly among older adults. Sarilumab demonstrated sustained effectiveness and a consistent safety profile with no new safety signals

Study context

Population
Adult patients with rheumatoid arthritis (RA) initiating sarilumab in routine clinical practice across Japan1,715 in effectiveness analysis
Participants
1,998 patients
Exposure
Sarilumab monotherapy vs sarilumab in combination with csDMARDs
Outcome
Mean change from baseline in CDAI
Follow-up
Week 52
Methodological detailsopen-label, non-interventional, nationwide, 52-week
  • Open-label
  • Non-interventional
  • Nationwide
  • 52-week

Main finding

As reported in the abstract

Monotherapy

−14.2

mean

Combination

−14.9

mean

Observational data: associations, not effects.

Further findings

Mean

OutcomeMonotherapyCombination
Mean change from baseline in CDAI · week 24−13.6−13.1

Mean Clinical Disease Activity Index (CDAI), overall · week 12

Baseline mean CDAI
21.2
Mean CDAI at week 12 (low disease activity range)
9.7

Sarilumab retention, overall · week 52

Retention
67.5%

Other measures, including patient-reported outcomes (PROs)

Similar improvements in both groups

Safety

TEAEs · safety population

Treatment-emergent adverse events (TEAEs) — TEAEs overall
44.6%

Parts of this Brief are withheld: the automatic checks could not confirm them against the abstract.

Original publication

Real-world effectiveness, safety and patient-reported outcomes of sarilumab in patients with rheumatoid arthritis: a 52-week, prospective, open-label, non-interventional, observational, nationwide, large-cohort study in Japan (PROFILE-J). RMD Open. Published 12 May 2026. doi:10.1136/rmdopen-2025-006446

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