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. Author manuscript; available in PMC: 2013 Jul 18.

Published in final edited form as: Oral Oncol. 2001 Jul;37(5):437–445. doi: 10.1016/s1368-8375(00)00099-3

Table 4.

Prevalence of CYP2E1 genotypes in smokers stratified by smoking dose

	Smoking		CYP2E1 genotype
	dose (py)		cl/cl	cl/c2	cl/c3	c2/c3	c4/c4
Caucasians	≤ 24	Cases	35	0	0	0	0
		Controls	142	11	1	0	0

		OR (95% CI)			undefined (P = 0.127)^a
	> 24	Cases	69	7	0	0	1
		Controls	66	3	1	0	0

		OR (95% CI)^b	1.0		0.59 (0.15–2.40)
African Americans	≤ 24	Cases	15	0	0	0	0
		Controls	112	1	10	0	0

		OR (95% CI)			undefined (P = 0.598)^a
	> 24	Cases	37	0	5	1	0
		Controls	38	0	7	0	0

		OR (95% CI)^b	1.0		0.69 (0.19–2.46)
Combined	≤ 24	Cases	50	0	0	0	0
		Controls	254	12	11	0	0

		OR (95% CI)			undefined (P = 0.033)^a
	> 24	Cases	106	7	5	1	1
		Controls	104	3	8	0	0

		OR (95% CI)^c	1.0		0.70 (0.26–1.84)