Accuracy of coding by hospital
| Parameter | Estimate (95% CI), % |
|---|---|
| Confirmed cases (U07.1 only) | |
| Hospital A | |
| Sensitivity | 98.5 (95.7–99.7) |
| Specificity | 99.4 (99.2–99.6) |
| Positive predictive value | 84.5 (79.3–88.9) |
| Negative predictive value | 100 (99.9–100) |
| Hospital B | |
| Sensitivity | 97.7 (94.1–99.4) |
| Specificity | 99.8 (99.5–99.9) |
| Positive predictive value | 95.4 (91.2–98.0) |
| Negative predictive value | 99.9 (99.7–100) |
| Hospital C | |
| Sensitivity | 95.9 (88.5–99.1) |
| Specificity | 99.3 (98.8–99.6) |
| Positive predictive value | 83.3 (73.6–90.6) |
| Negative predictive value | 99.8 (99.5–100) |
Note: CI = confidence interval.