Spondyloarthritis & psoriatic arthritis

Effectiveness of TNF inhibitors in patients with very early axial spondyloarthritis, defined as duration of ≤1 year of back pain: longitudinal observational data from the SCQM registry

RMD OpenPublished Prospective cohort study

Main finding · ASDAS <2.1Result — go to the resultOdds ratio 1.08 95% CI 0.70–1.68

Authors' conclusion

We found no evidence for a better effectiveness of TNFi in patients with very early versus established axSpA.

Study context

Population
Patients with axial spondyloarthritis (axSpA) in the Swiss Clinical Quality Management in Rheumatic Diseases (SCQM) registry with available data on duration of back pain
Participants
3,324 patients
Exposure
First tumour necrosis factor inhibitor (TNFi) in very early vs established axSpA
  • Very early axSpAn = 441
  • Early axSpAn = 218
  • Established axSpAn = 2,575reference
Outcome
Low disease activity (ASDAS <2.1) after a first TNFi
Follow-up
1 year
Methodological detailslongitudinal observational registry, multiple-adjusted, multiple imputation by chained equations
  • Longitudinal observational registry
  • Multiple-adjusted
  • Multiple imputation by chained equations

Main finding

ASDAS <2.1

Odds ratio

1.08

95% CI 0.70–1.68

Very early axSpAvs Established axSpA
OR 1.08 (95% CI 0.70–1.68)

As reported in the abstract

Observational data: associations, not effects.

Further findings

OutcomeHR (95% CI)
TNFi drug discontinuation (retention)Very early axSpAvs Established axSpA1.05 (0.84–1.31)

First TNFi started

Objective signs of inflammation

More prevalent in very early disease

Original publication

Effectiveness of TNF inhibitors in patients with very early axial spondyloarthritis, defined as duration of ≤1 year of back pain: longitudinal observational data from the SCQM registry. RMD Open. Published 5 March 2026. doi:10.1136/rmdopen-2025-006647

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