Table 3

Sensitivity, specificity, positive predictive value (PPV), and negative predictive value (NPV) of serological markers in 96 patients with RA with disease duration of about 8 years

Serological marker Sensitivity (%) Diagnostic specificity (%) PPV (%) NPV (%)
AKA44979169.5
IgA RF77847983
IgM RF78847884
IgA RF + IgM RF72888281
AKA + IgA RF + IgM RF35989267
ANCA338461.563
ANA51685464
  • For definitions of abbreviations, see text.