Table 2 Diagnostic accuracy of the screening questions on prior non-prescription antibiotic use to identify intended users
From: A screening question to assess risk of using antibiotics without a prescription: a diagnostic study
Screening question | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Bayes PPVb (95% CI) | Bayes NPVb (95% CI) |
|---|---|---|---|---|---|---|
Any prior use of antibiotics without a prescription (n = 564) | 85.7% (78.8–91.1) | 70.3% (65.7–74.6) | 48.8% (42.4–55.2) | 93.7% (90.5–96.1) | 48.8% (45.1–52.5) | 93.7% (92.9–94.6) |
Prior use of non-prescription antibiotics in the last 12 months (n = 409)a | 75.9% (65.3–84.6) | 91.4% (87.8–94.2) | 69.2% (58.7–78.5) | 93.7% (90.5–96.1) | 74.5% (67.7–81.2) | 92.0% (90.4–93.6) |