Development of a Loop Mediated Isothermal Amplification for Diagnosis of Ascaris lumbricoides in Fecal Samples

Table 4

Agreement expected by chance alone of LAMP and Kato-Katz technique.

	Kato-Katz (gold standard)		Total
	Positive	Negative
LAMP
Positive	18.2	12.8	31
Negative	8.8	0.2	9
Total	27	13	40

Percent agreement expected by chance alone = (18.2 + 0.2)/40 × 100 = 46%.
Kappa = ((percent agreement observed) − (percent agreement expected by chance alone))/(100%  − (percent agreement expected by chance alone)) = (85 − 46)%/(100 − 46)% = 0.72%.