Table 2. Agreement between different techniques for the diagnosis of S. mansoni infections.

		Setting A				Setting B				Setting C				All settings A-B-C
Diagnostic test	Test result	Nine Kato-Katz thick smears				Nine Kato-Katz thick smears				Nine Kato-Katz thick smears				Nine Kato-Katz thick smears
		Positive	Negative	K*	P-value	Positive	Negative	K*	P-value	Positive	Negative	K*	P-value	Positive	Negative	K*	P-value
One Kato-Katz (stool day 1)	Positive	29	0	0.63	8.8 10−16	100	0	0.42	4.4 10−16	76	0	0.4	3.1 10−15	205	0	0.47	0
	Negative	21	88			76	69			79	87			176	244
Three Kato-Katz (stool 1)	Positive	33	0	0.71	0	120	0	0.54	0	108	0	0.62	0	261	0	0.62	0
	Negative	17	88			56	69			47	87			120	244
One CCA (urine day 1)	Positive	41	31	0.42	1.14 10−7	145	26	0.43	7.1 10−12	136	37	0.47	7.6 10−14	322	94	0.47	0
	Negative	9	57			31	43			19	50			59	150
Three CCA	Positive	46	40	0.4	5.84 10−8	160	45	0.29	9.8 10−7	149	60	0.31	3.4 10−9	355	145	0.37	0
	Negative	4	48			16	24			6	27			26	99
One CCA-L	Positive	23	0	0.52	3.1 10−12	121	6	0.49	0	86	7	0.41	3.3 10−13	230	13	0.5	0
	Negative	27	88			55	63			69	80			151	231

^*k<0 indicating no agreement, k = 0–0.2 indicating poor agreement, k = 0.21–0.4 indicating fair agreement, k = 0.41–0.6 indicating moderate agreement, k = 0.61–0.8 indicating substantial agreement, and k = 0.81–1 indicating almost perfect agreement.