Table 2.
Qualitative Diagnostic Characteristics of Methanol Content of Suspected Beverages Using Modified CA Method and Gold Standard Gas Chromatography (n = 1221, p < 0.001)
| Gold standard | Sensitivity (95% CI) | Specificity (95% CI) | PPV (95% CI) | NPV (95% CI) | Accuracy (95% CI) | Prevalence (95% CI) | |||
|---|---|---|---|---|---|---|---|---|---|
| Test Results | positive | negative | |||||||
| positive | 128 | 32 |
100 (97.16–100) |
97.07 (95.89–97.99) |
80 (73.98–84.91) |
100 (100) |
97.38 (96.32–98.2) |
10.48 (8.82–12.34) |
|
| negative | 0 | 1061 | |||||||
| Safe drink | |||||||||
| positive | 123 | 37 |
100 (97.05–100) |
96.63 (95.38–97.62) |
76.88 (70.78–82.02) |
100 (100) |
97.86 (95.85–98.2) |
10.07 (8.44–11.09) |
|
| negative | 0 | 1061 | |||||||