Table 2: Diagnostic performance of five antigen combinations. The positive detection was defined as positive with different number of antigens as shown.

Positive antigensOneTwoThreeFourFive

+++++

TB29828810259392108814615256242
Control95415418771085194095

Sensitivity96.64%86.91%70.47%48.99%18.79%
Specificity56.84%81.05%89.47%98.95%100%
Youden0.53480.67960.59940.47940.1879
PPV87.54%93.50%95.45%99.32%100%
NPV84.38%66.38%49.13%38.21%28.19%

indicates the least number of antigens defined for positive detection.