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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