Table 1: Diagnostic performance of individual antigens.

AntigensRv3871Rv3874Rv3875Rv3876Rv3879

+++++

TB298242561881109610218611224949
Control952471590128314811679

Sensitivity81.21%63.09%32.21%62.42%83.56%
Specificity74.74%94.74%87.37%85.26%83.16%
Youden0.55950.57830.19580.47680.6672
PPV90.98%97.41%88.89%93.0%93.96%
NPV55.91%45%44.86%41.97%61.72%

PPV: positive predictive value, NPV: negative predictive value, and Youden: Youden index = sensitivity + specificity – 1.