Polymorphisms of alcohol dehydrogenase 2 and aldehyde dehydrogenase 2 and colorectal cancer risk in Chinese males

Table 1 Background characteristics of male colorectal cancer patients and controls

	Controls		Patients		χ2MH	P
	No.	%	No.	%
Age (yr)
< 40	25	11.26	21	11.05	4.467	0.346
40-49	33	14.86	39	20.53
50-59	76	34.23	50	26.32
60-69	62	27.93	53	27.89
> 70	26	11.71	27	14.21
Total	222		190
Smoking status
Nonsmoker	87	39.19	67	35.26	3.794	0.150
Current smoker	122	54.95	102	53.68
Former smoker	13	5.86	21	11.05
Drinking status
Nondrinker	124	55.86	73	38.42	15.952	0.001
Current drinker	91	40.99	99	52.11
Former drinker	7	3.15	18	9.47
Kinds of alcoholic beverage
Hot wine	68	69.39	77	40.53	3.453	0.327
Beer	0	0	2	1.05
Wine	3	3.06	1	0.53
All kinds	27	27.55	37	31.62
Alcohol consumption (g/mo)
0-29	124	55.86	73	38.42	15.437	0.001
30-299	20	9.01	14	7.37
300-599	17	7.66	20	10.53
≥ 600	61	27.46	83	43.68