Table 2—

Predictive characteristics of a prognostic index >0.25 and positivity for multiple (two or more) autoantibodies

Prognostic index >0.25Two or more AutoantibodiesDifference (95% CI)
Sensitivity (%)78.768.110.6 (−7.1 to 28.4)
Specificity (%)95.798.22.5 (0.6 to 4.3)
Positive predictive value (%)56.972.715.8 (−2.0 to 33.6)
Negative predictive value (%)98.497.70.7 (−0.8 to 2.2)