Spondyloarthritis & psoriatic arthritis

Sex-specific disparities in disease activity scores among patients with axial spondyloarthritis and their implications for evaluating the response to tumor necrosis factor alpha inhibitor therapy

Arthritis Res TherPublished Retrospective cohort study

Authors' conclusion

The changes in disease activity before and after TNFi use were significantly different between sexes when measured by BASDAI, but not ASDAS.

Study context

Population
Patients with axial spondyloarthritis (axSpA) who started or changed TNFi, KOBIO registry, Korea1,343 (76.6%) male
Participants
1,753 patients
Exposure
Male vs female patients with axSpA starting TNFi
  • Malen = 1,343
Outcome
Sex differences in change in BASDAI and ASDAS from baseline to 1 year after TNFi initiation
Follow-up
One year
Methodological detailsregistry-based (KOBIO), adjusted for baseline characteristics
  • Registry-based (KOBIO)
  • Adjusted for baseline characteristics

Main finding

As reported in the abstract

BASDAI change independently associated with sex (β)

0.343

p = 0.011

Ankylosing Spondylitis Disease Activity Score (ASDAS) change not associated with sex (β)

0.079

p = 0.235

Observational data: associations, not effects.

Further findings

OutcomeOR (95% CI)
TNFi assessed as effective by BASDAI criterion (ΔBASDAI ≥ 50% or ≥ 2) · one yearMalevs FemaleAdjusted for other baseline characteristics1.700 (1.200–2.406)
TNFi assessed as effective by ASDAS criterion (ΔASDAS ≥ 1.1) · one yearMalevs FemaleAdjusted for other baseline characteristics0.993 (0.678–1.455)

Baseline disease activity, all patients

Mean BASDAI
5.98
Mean ASDAS
3.6

Original publication

Sex-specific disparities in disease activity scores among patients with axial spondyloarthritis and their implications for evaluating the response to tumor necrosis factor alpha inhibitor therapy. Arthritis Res Ther. Published 25 April 2024. doi:10.1186/s13075-024-03320-x

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