Table 4.

Prevalence and diagnostic performance observed at Guatemala Site 2

Parameter	Chlamydia	Gonorrhoea	Trichomoniasis
Prevalence	7.6%	1.0%	8.0%
Sensitivity (CI)	84.6% (71.9–93.1)	100% (59.0-100)	60.0% (45.2–73.6)
Specificity (CI)	99.0% (97.9–99.7)	100% (99.5–100)	100% (99.4–100)
Change to pooled estimates:
Sensitivity (CI)	83.6% (72.8–90.6)	90.9% (85.7–94.4)	64.0% (58.9–68.9)
Specificity (CI)	98.3% (96.9–99.1)	99.6% (98.1–99.9)	99.6% (97.5–100)
Likelihood Ratio + (CI)	48.7 (27.8–85.5)	240.3 (47.6-1214.8)	176.6 (25.5–1224.0)
Likelihood Ratio - (CI)	0.17 (0.10–0.29)	0.09 (0.06–0.15)	0.36 (0.31–0.42)