Table 4. Sensitivity and negative predictive value (NPV) at two and 18 months post-treatment.

Test method	Sensitivity (95%CI)	NPV (95%CI)
Microscopy
Post-treatment (2 month)	31% (22, 42)	35% (25, 46)
Post-treatment (18 month)	74% (64, 82)	38% (24, 54)
Microhaematuria
Post-treatment (2 month)	33% (23, 44)	33% (23, 44)
Post-treatment (18 month)	53% (43, 63)	26% (16, 39)
cSEA-ELISA
Post-treatment (2 month)	32% (21, 44)	26% (16, 39)
Post-treatment (18 month)	46% (36, 56)	17% (9, 29)
Real-time PCR
Post-treatment (2 month)	95% (88, 99)	89% (73, 97)
Post-treatment (18 month)	92% (85, 96)	67% (45, 84)

Note: Real-time PCR and/or microscopy positivity was used as ‘gold standard.’