Table 4.

Sensitivity and specificity of syndromic diagnoses for STIs and urogenital schistosomiasis

	CT/NG			TV			S. haematobium
	NAAT+	NAAT−	Total	NAAT+	NAAT−	Total	Urine+	Urine−	Total
Symptomatic	4	75	79	16	65	81	11	72	83
Asymptomatic	12	260	272	36	240	276	53	231	284
Total	16	335	351	52	305	357	64	303	367
Sensitivity	(4/16) = 25%			(16/52) = 31%			(11/64) = 17%
Specificity	(260/335) = 78%			(240/305) = 79%			(231/303) = 76%

CT/NG = chlamydia or gonorrhea (Chlamydia trachomatis or Neisseria gonorrhoeae); NAAT = nucleic acid amplification test; STI = sexually transmitted infection; TV = trichomoniasis (Trichomonas vaginalis). For each infection of interest, syndromic recognition (defined as the presence of any urogenital symptom in patient reports) was compared against the appropriate gold standard laboratory test: NAAT for STIs and urine microscopy for schistosomiasis.