Table 2.

Diagnostic agreement between sodium nitrate flotation and quantitative polymerase chain reaction

	SNF result	qPCR detected (n)	qPCR not detected (n)	Agreement (%)	Kappa statistic*	P value
Ascaris lumbricoides	Detected	44	10	428 (89.7)	0.59	< 0.001
	Not detected	39	384
Hookworm	Detected	5	0	444 (92.9)	0.21	< 0.001
	Not detected	34	439
Trichuris trichiura	Detected	7	1	461 (96.4)	0.44	< 0.001
	Not detected	16	454

qPCR = quantitative polymerase chain reaction; SNF = sodium nitrate flotation.

^*Kappa agreement classification: < 0.20 = poor; 0.21–0.40 = fair; 0.41–0.60 = moderate; 0.61–0.80 = good; 0.81–1.00 = very good.