Table 3 Data on sensitivity, specificity, PPV, NPV & % misclassification as per national and international cut-offs

DHSs and AISs cut-off

(>200 copies/ml)

Sensitivity = 97%, specificity = 100%, PPV = 100%, NPV = 88%

% misclassification (95%CI) = 2.14% (0.6%, 5.4%)

WHO cut-off

(>400 copies/ml)

Sensitivity = 97%, specificity = 97%, PPV = 99%, NPV = 89%

% misclassification (95%CI) = 2.67% (0.9%, 6.1%)

NACO cut-off

(>1000 copies/ml)

Sensitivity = 97%, specificity = 98%, PPV = 99%, NPV = 91%

% misclassification (95%CI) = 2.67% (0.9%, 6.1%)