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Table 3 Pharmacy Refill Adherence (PRA) prediction of detectable viral load

From: Comparison of efavirenz levels in blood and hair with pharmacy refills as measures of adherence and predictors of viral suppression among people living with HIV in Nigeria

PRA/viral load

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

p value

 > 50 copies/ml

 ≤ 100%

70.0

14.0

27.5

50.0

0.13

 ≤ 95%

78.6

18.4

21.6

75.0

0.80

 ≤ 85%

66.7

18.3

3.9

91.7

0.52

 ≤ 75%

83.0

30.0

86.3

25.0

0.34

 > 1000 copies/ml

 ≤ 100%

15.0

86.0

33.3

68.5

0.91

 ≤ 95%

14.3

85.7

77.8

14.8

1.0

 ≤ 85%

33.3

86.7

11.1

96.3

0.33

 ≤ 75%

13.2

80.0

22.2

77.8

0.57

  1. PPV positive predictive value; NPV negative predictive value; AUC 0.565