TableĀ 3

Concordance between clinical axSpA diagnosis and meeting the ASAS classification criteria for axSpA in patients with CBP with the physician's diagnosis as the gold standard in the SPACE cohort (n=500)

Clinical axSpA diagnosis
ASAS classification criteriaYesNoTotal
Yes19040230
No60210270
Total250250500
  • Sensitivity 76% (190/250) and specificity 84% (210/250). Positive predictive value: 190/230 (83%), negative predictive value: 210/270 (78%).

  • AxSpA, axial spondyloarthritis; ASAS, Assessment of SpondyloArthritis international Society; CBP, chronic back pain; SPACE, SPondyloArthritis Caught Early.