Risk factors for the gastric cardia cancer: A case-control study in Fujian Province

Table 3 The interrelation between smoking and kinds of gastric cancers

Variables	Controls	Cardia cancer				Non-cardia gastric cancer
	n	n	OR*	95%CI	P	n	OR*	95%CI	P
Smoking						99
No	120	74
Yes	102	117	2.090	1.261-3.464	0.004	91	1.325	0.814-2.157	0.257
Daily consumed cigarettes
0	120	74				99
< 19	37	28	1.443	0.753-2.766	0.270	27	1.092	0.579-2.062	0.785
≥ 20	65	89	2.513	1.455-4.339	0.001	64	1.478	0.863-2.531	0.155
P For trend			0.000				0.472
Smoking duration (yrs)
0	120	74				99
< 30	53	37	1.408	0.755-2.625	0.282	36	1.073	0.596-1.933	0.814
≥ 30	49	80	2.717	1.548-4.768	0.000	55	1.600	0.906-2.825	0.105
P For trend	0.000					0.289

*Adjusted by age, gender, drinking and family cancer history in the first-degree relatives.