Evaluation of the performance of extreme patient-reported outcomes as surrogate markers for fibromyalgia in axial spondyloarthritis.
Daniela Santos-FariaMaxime DougadosLaure GossecSerge PerrotAnna MoltóPublished in: Rheumatology international (2018)
The proposed extreme PRO definition showed great specificity for FM recognition in patients with axSpA, suggesting it could be used in observational studies when specific items for FM classification are not available.