Table 2.
Sensitivities, specificities, and positive and negative predictive values for detecting C. trachomatis infectiona
| Test | No. of positive samples detected | Sensitivity (%) (95% CI) | Specificity (%) (95% CI) | PPV (%) | NPV (%) |
|---|---|---|---|---|---|
| AC2 | 34 | 97.1 (85.1–99.9) | 100 (99.0–100) | 100 | 99.7 |
| AMP | 32 | 91.4 (76.9–98.2) | 99.7 (98.6–100) | 97.0 | 99.2 |
| PT | 27 | 77.1 (60.0–89.6) | 100 (99.0–100) | 100 | 97.8 |
a
Values are for testing of SurePath L-Pap samples from 35 infected and 359 uninfected women before processing of the samples for cytology. CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value. P values: AC2 versus PT, P = 0.02; AC2 versus AMP, P = 0.48; AMP versus PT, P = 0.07.