Table 3.
Statistical evaluation of methods for virus detection from recreational waters.
| Method | Sample type | Sensitivity (%) | Specificity (%) | Accordance (%) | Concordance (%) | COR | |
|---|---|---|---|---|---|---|---|
| A | Adenovirus/freshwater | Positive | 77.2 (71.3–82.1)* | N/A | 73.9 (61.2–86.5) | 63.5 (50.9–81.7) | 1.63 (1.07–2.52) |
| Negative | N/A | 96.1 (92.8–98.0) | 93.0 (85.2–100) | 92.5 (84.8–100) | 1.08 (1.00–1.16) | ||
| B | Adenovirus/seawater | Positive | 89.3 (82.5–93.6) | N/A | 85.9 (68.9–94.9) | 79.6 (66.1–92.7) | 1.57 (1.01–2.29) |
| Negative | N/A | 99.2 (95.5–99.9) | 98.6 (97.4–100) | 98.3 (94.6–100) | 1.25 (0.97–1.44) | ||
| C | Norovirus/freshwater | Positive | 91.4 (87.1–94.3) | N/A | 86.2 (74.4–96.1) | 83.9 (71.9–95.7) | 1.2 (1.02–1.35) |
| Negative | N/A | 96.1 (92.8–98) | 92.9 (87–97.7) | 92.5 (86.8–97.5) | 1.06 (0.97–1.14) | ||
| D | Norovirus/seawater | Positive | 91.7 (85.5–95.5) | N/A | 85.3 (75.6–94.9) | 84.6 (75.3–94.9) | 1.05 (0.81–1.38) |
| Negative | N/A | 92.6 (86.5–96.0) | 88.0 (70.8–100) | 85.7 (70.1–100) | 1.22 (0.92–2.18) |
*Numbers in parentheses indicate lower and upper 95% confidence intervals.