Table 2. Genotype and allele frequencies of the CASP8 -652 6N ins/del polymorphism among cases and controls and their associations with risk of prostate cancer.

CASP8	Cases (n = 406)	Controls (n = 408)	Adjusted OR (95% CI)a	Pb
	n (%)	n (%)
Genotypes				0.001
ins/ins	257 (63.3)	211 (51.7)	1.00
ins/del	132 (32.5)	159 (39.0)	0.68 (0.51-0.92)	0.011
del/del	17 (4.2)	38 (9.3)	0.34 (0.19-0.63)	0.001
del allele	0.20	0.29		< 0.001
Ptrend				0.001

^a Adjusted for age, smoking and drinking status; ^b Two-sided χ² test. OR: odds ratio.