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. 2022 Nov 15;19:51. doi: 10.1186/s12981-022-00475-y

Table 4.

Sensitivity, Specificity, NPV and PPV for combined self-reported and pharmacy refill adherence

Cut-offs Viral load Sensitivity Specificity PPV NPV
 ≥ 20  < 20
 < 80% 14 26 20.3 83.2 35.0 70.1
 ≥ 80% 55 129
 < 85% 17 29 24.6 81.3 37.0 70.8
 ≥ 85% 52 126
 < 90% 21 34 30.0 78.1 38.2 71.2
 ≥ 90% 49 121
 < 95% 30 45 42.9 71.0 40.0 73.3
 ≥ 95% 40 110
 < 100% 40 74 57.1 52.6 35.1 73.2
100% 30 82

PPV positive predict value, NPV negative predict value, RTMM real time medication monitoring.