Spondyloarthritis & psoriatic arthritis

Sex-specific diagnostic efficacy of MRI in axial spondyloarthritis: challenging the ‘One Size Fits All’ notion

RMD OpenPublished Diagnostic accuracy study

Authors' conclusion

The diagnostic performance of structural MRI markers is substantially lower in female patients with axSpA; active inflammatory lesions show comparable performance in both sexes, while still overall inferior to structural markers.

Study context

Population
Patients with back pain from six prospective cohorts; Axial spondyloarthritis (axSpA) vs chronic low back pain controls; clinical diagnosis as reference standard1,194 screened
Participants
526 patients
Comparison
Diagnostic performance of MRI findings in men vs women with axSpA
  • Menn = 243
  • Womenn = 136
  • Controlsn = 147reference
Outcome
Diagnostic performance (DOR from LR+/LR-) of MRI findings (ankylosis, erosion, sclerosis, fat metaplasia, bone marrow oedema) by sex
Methodological detailspost hoc analysis, six prospective cohorts, two blinded independent readers
  • Post hoc analysis
  • Six prospective cohorts
  • Two blinded independent readers

Performance

As reported in the abstract

Diagnostic performance of MRI lesions by sex
Bone marrow oedema diagnostic OR (DOR), men
3.0
Bone marrow oedema DOR, women
3.9
Fat metaplasia DOR, men
37.9
Fat metaplasia DOR, women
5.0
Erosions specificity, women vs men
77% vs 87%
Sclerosis specificity, women vs men
44% vs 66%
Fat metaplasia specificity, women vs men
87% vs 96%

Original publication

Sex-specific diagnostic efficacy of MRI in axial spondyloarthritis: challenging the ‘One Size Fits All’ notion. RMD Open. Published 29 October 2023. doi:10.1136/rmdopen-2023-003252

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