Spondyloarthritis & psoriatic arthritis

Efficacy of upadacitinib in subgroups of patients with axial spondyloarthritis with early versus established disease

RMD OpenPublished Post hoc subgroup analysis of the SELECT-AXIS 1 and 2 randomised trials

Authors' conclusion

Regarding short-term outcomes, both subgroups of patients (shorter axSpA symptom duration (≤2 years) and longer symptom duration (>2 years)) achieved comparable results when treated with upadacitinib.

Study context

Population
Patients with r-axSpA and nr-axSpA, bDMARD-naïve or with intolerance or inadequate response to bDMARD; stratified by symptom duration (nr-axSpA: early ≤2 vs established >2 years, and ≤5 vs >5 years; r-axSpA: ≤5 vs >5 years)
Comparison
Upadacitinib vs placebo in axial spondyloarthritis (axSpA) with shorter vs longer symptom duration
Primary endpoint
Efficacy endpoints including proportion achieving ASDAS and ASAS40 responses; upadacitinib vs placebo by RR, shorter vs longer symptom duration by RR ratio
Follow-up
Week 14
Methodological detailsplacebo-controlled, stratified by symptom duration
  • Placebo-controlled
  • Stratified by symptom duration

Primary result

As reported in the abstract

Efficacy endpoints by symptom duration
  • Better responses with upadacitinib vs placebo in all endpoints assessed, regardless of symptom duration
  • Early/shorter vs established/longer symptom duration: no statistically significant differences for all measures, except change in high-sensitivity CRP in nr-axSpA (better response in early disease)

Further findings

OutcomeDifference (95% CI)
Change from baseline in high-sensitivity CRP, nr-axSpA, earlyvs established disease · week 14Better response in early disease−8.2 (−14.9 to −1.6)

Original publication

Efficacy of upadacitinib in subgroups of patients with axial spondyloarthritis with early versus established disease. RMD Open. Published 4 March 2025. doi:10.1136/rmdopen-2024-005110

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