Table 3.

Diagnostic accuracy of LED-AP and lateral-flow test strip for cryptosporidiosis

	LED-AP	Lateral-flow test strip
Cryptosporidiosis prevalence	9% (8–12)	10% (8–13)
Sensitivity	88% (79–94)	89% (79–94)
Specificity	99% (98–99)	99% (97–99)
Positive predictive value	88% (79–94)	87·5% (78–93)
Negative predictive value	99% (98–99)	99% (98–99)
Likelihood ratio of a positive test	71·0 (36·9–136·3)	62·6 (32·6–120·4)
Likelihood ratio of a negative test	0·1 (0·1–0·2)	0·1 (0·1–0·2)

Data are point estimates with 95% CI. Cryptosporidiosis was defined as a case of diarrhoea with a positive clinical composite reference standard. Absolute numbers are shown in the appendix (p 10). LED-AP=light-emitting diode fluorescence microscopy with auramine-phenol (AP) staining.