Table 4.

PA content of thirty-two flour samples collected from affected villages, Gulran District, Afghanistan, 2008.

	Flour Samples median, (mg/kg)
	Cases n = 12	Controls n = 20
Heliotrinea	0.16	0.07
Heliotrine-N-oxide	5.4	2.6
Lasiocarpineb	0.045	0.025
(quantified against echemidine)
TOTAL PA	5.6	2.7

Mann-Whitney rank-sum test between cases and controls for flour samples:

^a: z = 2.0, P = .050

^b: z = 1.9, P = .057.