. Author manuscript; available in PMC: 2014 Jan 7.

Published in final edited form as: Int J Cancer. 2011 Aug 8;130(8):10.1002/ijc.26199. doi: 10.1002/ijc.26199

Table 4.

Proband-only analysis of interaction between GSTP1 Ile105Val and number of sevings of cooked^c poultry per week

	Colorectal cancer				Colon cancer				Rectal cancer				Heterog. p-value^b
	N	OR^a	95% CI	p-value	N	OR^a	95% CI	p-value	N	OR^a	95% CI	p-value	Heterog. p-value^b
	*≤ 3/>3*				*≤ 3/>3*				*≤ 3/>3*
Ile/Ile	164/80	1^ref			107/42	1^ref			33/29	1^ref
Ile/Val	195/55	0.58	0.39-0.86	0.007	126/32	0.65	0.38-1.09	0.106	50.16	0.36	0.17-0.77	0.008
Val/Val	59/14	0.49	0.26-0.92	0.028	29/9	0.79	0.34-1.81	0.578	19/3	0.18	0.05-0.67	0.011
per Val allele		0.65	0.49-0.87	0.004		0.79	0.54-1.16	0.232		0.40	0.22-0.70	0.001	0.043

Case-only analyses were done using unadjusted unconditional logistic regression models using the dichotomized exposure as the outcome variable, using individual SNPs as the independent variables to obtain ORs that would be equivalent to interaction OR (IOR).

colon vs rectum heterogeneity test;

pan-fried, oven-broiled, or grilled