Spondyloarthritis & psoriatic arthritis

Clinical and imaging outcomes of different phenotypes of axial spondyloarthritis: 5-year analysis of the DESIR cohort

Semin Arthritis RheumPublished Prospective cohort study

Main finding · Disability (BASFI) over timeResult — go to the resultβ 0.4 95 % CI 0.2–0.7

Authors' conclusion

Patients with 'axSpA at risk' show worse self-reported outcomes over time and are less likely to benefit from anti-inflammatory treatment than those with a classical axSpA phenotype.

Study context

Population
Patients with a clinical diagnosis of axial SpA (axSpA) from the DESIR cohort
Participants
576 patients
Exposure
Three baseline axSpA phenotypes: 'At risk' and 'IBP+Peripheral' vs 'Axial'
Outcome
Disability (BASFI) over time
Follow-up
Up to 5 years
Methodological detailslatent class analysis, multivariable GEE models, 5-year follow-up
  • Latent class analysis
  • Multivariable GEE models
  • 5-year follow-up

Main finding

As reported in the abstract

β

0.4

95 % CI 0.2–0.7

Observational data: associations, not effects.

Further findings

BASFI difference, At risk vs Axial, by bDMARD treatment (subgroup)

β in patients receiving bDMARDs
0.6
β in patients not receiving bDMARDs
0.5
∆BASFI in treated 'Axial'
−1.3
∆BASFI in treated 'At risk'
−0.9

BASFI difference by sex and HLA-B27 (subgroup)

Difference mostly noted in female patients who were HLA-B27 positive

Original publication

Clinical and imaging outcomes of different phenotypes of axial spondyloarthritis: 5-year analysis of the DESIR cohort. Semin Arthritis Rheum. Published 2 March 2024. doi:10.1016/j.semarthrit.2024.152424

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