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Table 5 Sensitivity, Specificity, NPV and PPV for combined self-report, pharmacy refill and RTMM adherence measure

From: Predicting viral load suppression by self-reported adherence, pharmacy refill counts and real time medication monitoring among people living with HIV in Tanzania

Cut-offs

Viral load

Sensitivity

Specificity

PPV

NPV

 ≥ 20

 < 20

 < 80%

11

20

45.8

63.0

35.5

72.3

 ≥ 80%

13

34

    

 < 85%

14

22

58.3

59.3

38.9

76.2

 ≥ 85%

10

32

    

 < 90%

15

26

62.5

52.7

36.6

76.3

 ≥ 90%

9

29

    

 < 95%

19

33

79.2

40.0

36.5

81.5

 ≥ 95%

5

22

    

 < 100%

22

46

91.7

16.4

32.3

81.8

100%

2

9

    
  1. PPV positive predict value, NPV negative predict value, RTMM real time medication monitoring.
  2. NB: N is small due to RTMM being part of this analyses and a small percentage of participants used RTMM.