Rheumatoid arthritis

Site-specific articular responses to b/tsDMARDs in rheumatoid arthritis: a longitudinal observational study from the Swiss Clinical Quality Management Registry

RMD OpenPublished Longitudinal observational study

Authors' conclusion

The wrist, MCP2 and MCP3 joints resolve more slowly than other joints following treatment with b/tsDMARDs

Study context

Population
Patients with rheumatoid arthritis (RA) from the Swiss Clinical Quality Management in Rheumatic Diseases registry with ≥1 swollen joint at initiation of a b/tsDMARDRA with ≥1 swollen joint
Participants
598 / 242 / 317 / 333 / 176 / 874
Exposure
Speed of resolution of individual swollen joints within the 28-joint count vs the wrist
  • Tumour necrosis factor inhibitors (TNFi) (bio-naïve)n = 598
  • Abataceptn = 242
  • IL-6Rin = 317
  • Janus kinase inhibitor (JAKi)n = 333
  • Rituximabn = 176
  • TNFin = 874
Outcome
Time to resolution of swollen joints vs wrist
Methodological detailsregistry-based (SCQM), mixed effects models accounting for interval-censored data, 2-year follow-up
  • Registry-based (SCQM)
  • Mixed effects models accounting for interval-censored data
  • 2-year follow-up

Main finding

As reported in the abstract

  • Compared with the wrist, all joints demonstrated higher rates of resolution, except for MCP2/3 joints and, in some analyses, the knee

Observational data: associations, not effects.

Further findings

Joint-specific response across all b/tsDMARD classes

Pattern of joint-specific response consistent across all b/tsDMARDs

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

Original publication

Site-specific articular responses to b/tsDMARDs in rheumatoid arthritis: a longitudinal observational study from the Swiss Clinical Quality Management Registry. RMD Open. Published 23 June 2026. doi:10.1136/rmdopen-2026-007034

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