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Table 6 Characteristics of the questionnaire for detecting HCV antibody categorized by opioid agonist therapy (OAT) history

From: A simple risk-based strategy for hepatitis C virus screening among incarcerated people in a low- to middle-income setting

History of risk behaviors

Sensitivity (%)

Specificity (%)

PPV (%)

NPV (%)

People on OAT (n = 621)

Drug use, ever

100

9

12

100

Injecting drug use, ever

65

90

46

95

Shared injection equipment, ever

45

95

56

93

HCV screening, ever

45

68

15

90

People with a history of OAT (n = 241)

Drug use, ever

94

29

9

98

Injecting drug use, ever

39

93

29

95

Shared injection equipment, ever

25

97

36

95

HCV screening, ever

25

63

5

92

People with no history of OAT (n = 949)

Drug use, ever

87

42

6

99

Injecting drug use, ever

39

96

29

98

Shared injection equipment, ever

17

98

29

97

HCV screening, ever

47

72

7

97

  1. PPV positive predictive value, NPV negative predictive value