Table 1.
Percent and 95% confidence intervals (95% CI) of patients who were correctly included (PPV) and excluded (NPV) from eligibility list, by health centre
| Clinic system | Positive predictive value | Negative predictive value | ||||
|---|---|---|---|---|---|---|
| N | % correctly included | (95% CI) | N | % correctly excluded | (95% CI) | |
| 1 | 80 | 77.5 | (66.5–85.8) | 40 | 97.5 | (85.3–99.9) |
| 2 | 40 | 90.0 | (75.4–96.7) | 40 | 100.0 | (89.1–99.8) |
| 3 | 60 | 90.0 | (78.8–95.9) | 30 | 96.7 | (81.0–99.8) |
| 4 | 60 | 95.0 | (85.2–98.7) | 30 | 90.0 | (72.3–97.4) |
| 5 | 80 | 85.0 | (74.9–91.7) | 40 | 100.0 | (89.1–99.8) |
| 6 | 40 | 80.0 | (63.9–90.4) | 20 | 95.0 | (73.1–99.7) |
| 7 | 40 | 87.5 | (72.4–95.3) | 20 | 90.0 | (66.9–98.2) |
| 8 | 120 | 95.8 | (90.0–98.4) | 60 | 95.0 | (85.2–98.7) |
| Total | 520 | 88.3 | (85.1–90.9) | 280 | 96.1 | (92.9–97.9) |