TABLE 8.
Performance characteristics of C. trachomatis ELISA, PCR, and SDA with and without supplemental testing of discordant results
| Test | Discrepant analysisa | Sensitivity (%) | 95% CI | Specificity (%) | 95% CI |
|---|---|---|---|---|---|
| ELISA | A | 28/71 (39.4) | 28.0–51.7 | 661/662 (99.8) | 99.2–100 |
| B | 29/75 (38.7) | 27.6–50.6 | 658/658 (100) | 99.4–100 | |
| PCR | A | 71/71 (100) | 94.9–100 | 646/662 (97.6) | 96.1–98.6 |
| B | 74/75 (98.7) | 92.8–100 | 645/658 (98.0) | 96.6–98.9 | |
| SDA | A | 71/71 (100) | 94.9–100 | 662/662 (100) | 99.4–100 |
| B | 71/75 (94.7) | 86.9–98.5 | 658/658 (100) | 99.4–100 |
a
A, before supplemental testing of discordant results; B, after resolution of discordant ELISA-positive and discordant PCR-positive results by LCR.