TABLE III. Comparison and agreement between results detected by the Reference Testa and polymerase chain reaction (PCR)-ELISAb .

		Reference Test		Total
		Positive	Negative
PCR-ELISA (500 mg of the 1st sample)	Positive	35	12	47
	Negative	37	117	154
Total		72	129	201
		Kappa = 0.426

a: four samples = 18 slides of Kato-Katz + TF-Test^®; b: single sample.