Spondyloarthritis & psoriatic arthritis
Axial psoriatic arthritis in patients not fulfilling the back pain entry features of the ASAS Classification Criteria for Axial Spondyloarthritis: findings from the ATTRACT Study
Authors' conclusion
This study demonstrates that among psoriatic patients who experience late-onset or non-chronic back pain, thereby not fulfilling ASAS entry pain features, a considerable proportion may be affected by active axPsA.
Study context
- Population
- Patients with psoriasis and back pain (ATTRACT Study)
- Participants
- 265 patients
- Exposure
- Non-ASAS back pain vs patients fulfilling both ASAS entry pain features
- non-ASAS/BPn = 50
- Outcome
- Prevalence of axPsA in patients not meeting ASAS entry pain features
Main finding
As reported in the abstract
AxPsA confirmed
Observational data: associations, not effects.
Further findings
Non-ASAS/BP subtypes
- Late-onset back pain (LoBP)
- 34/50 (68%)
- Non-chronic back pain (NcBP)
- 16/50 (32%)
Characteristics vs ASAS/BP
- Mean age higher and IBP prevalence lower in non-ASAS/BP
- Clinical disease activity similar between the two groups
Inflammatory and post-inflammatory radiographic and/or MRI changes in axPsA
- Similar proportion in non-ASAS/BP and ASAS/BP axPsA
Original publication
Axial psoriatic arthritis in patients not fulfilling the back pain entry features of the ASAS Classification Criteria for Axial Spondyloarthritis: findings from the ATTRACT Study. Rheumatology (Oxford). Published 19 May 2025. doi:10. 1093/ rheumatology/ keaf251
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