Table 3.

Sensitivity, specificity, and agreement of ASAS criteria compared to either Amor or ESSG criteria as the “gold standard.”

CriteriaSensitivity95% CISpecificity95% CIPositive Likelihood Ratio95% CI
Amor0.920.87, 0.950.560.27, 0.812.070.99, 4.30
ESSG0.900.85, 0.930.100.04, 0.231.000.89, 1.11
mAmor*0.910.87, 0.940.570.25, 0.842.140.91, 5.03
mESSG*0.890.84, 0.930.050.01, 0.170.940.86, 1.03
Analysis by imputation of ASAS criteria compared to either Amor or ESSG criteria:
Amor0.930.89, 0.950.560.27, 0.812.091.0, 4.33
Amor††0.880.84, 0.910.560.27, 0.811.980.95, 4.12
ESSG0.910.87, 0.940.110.05, 0.231.030.92, 1.14
ESSG††0.910.85, 0.930.130.06, 0.251.030.92, 1.16
  • * Inclusion of MRI for diagnosis of sacroiliitis into the original criteria.

  • Imputational analysis if all the 44 patients excluded from the analysis had sacroiliitis.

  • †† Imputational analysis if all the 44 patients excluded from the analysis did not have sacroiliitis. ASAS: Assessment in Spondyloarthritis International Society; mAmor: modified Amor; mESSG: modified European Spondylarthropathy Study Group.