Comparative Study of the Accuracy of Different Techniques for the Laboratory Diagnosis of Schistosomiasis Mansoni in Areas of Low Endemicity in Barra Mansa City, Rio de Janeiro State, Brazil

Table 6

Concordance between the positive results obtained using the COPT technique and those obtained using the other techniques, in fecal and serum samples collected from the sample population in the city of Barra Mansa, RJ, 2011.

Techniques	COPT		Total				IC (95%)
	Negative	Positive			McNemar	Kappa
	(%)	(%)	(%)				Lower	Higher
KK-HH
Negative	542 (94.8)	25 (4.4)	567 (99.1)		<0.001	0.224	0.038	0.409
Positive	1 (0.2)	4 (0.7)	5 (0.9)
Total	543 (94.9)	29 (5.1)	572 (100.0)
ELISA-IgG
Negative	530 (86.6)	11 (1.8)	541 (88.4)		<0.001	0.377	0.255	0.500
Positive	49 (8.0)	22 (3.6)	71 (11.6)
Total	579 (94.6)	33 (5.4)	612 (100.0)
ELISA-IgM
Negative	475 (77.6)	6 (1)	481 (78.6)		<0.001	0.266	0.178	0.354
Positive	104 (17.0)	27 (4.4)	131 (21.4)
Total	579 (94.6)	33 (5.4)	612 (100.0)
IFT-IgM
Negative	508 (83.0)	7 (1.1)	515 (84.2)		<0.001	0.347	0.241	0.454
Positive	71 (11.6)	26 (4.2)	97 (15.8)
Total	579 (94.6)	33 (5.4)	612 (100.0)
qPCR-feces
Negative	503 (87.9)	14 (2.4)	517 (90.4)		0.001	0.311	0.176	0.446
Positive	40 (7.0)	15 (2.6)	55 (9.6)
Total	543 (94.9)	29 (5.1)	572 (100.0)
qPCR-serum
Negative	574 (93.8)	29 (4.7)	603 (98.5)		<0.001	0.171	0.013	0.330
Positive	5 (0.8)	4 (0.7)	9 (1.5)
Total	579 (94.6)	33 (5.4)	612 (100.0)