Risk factors of gastric cancer specific for tumor location and histology in Cali, Colombia

Table 5 Factors related to GC risk -- results of tumor-location specific analysis

	Tumor location
	Lower third			Middle third			Upper third
	Case	Control	OR (95% CI)	Case	Control	OR (95% CI)	Case	Control	OR (95% CI)
Birth order 1
1	26	77	1.0 (referent)	8	27	1.0 (referent)	10	8	1.0 (referent)
2+	90	155	1.7 (1.0-2.8)	44	75	1.9 (0.8-4.3)	14	40	0.3 (0.1-0.9)
			P = 0.054			P = 0.154			P = 0.028
Salting meals before tasting
No	106	228	1.0 (referent)	47	101	1.0 (referent)	22	47	1.0 (referent)
Yes	11	6	3.7 (1.4-9.9)	5	2	5.0 (1.0-25.8)	2	1	4.0 (0.4-44.1)
			P = 0.010			P = 0.054			P = 0.258
Frequent fruits intake
No	5	3	1.0 (referent)	2	1	1.0 (referent)	0	0	-
Yes	112	231	0.3 (0.1-1.3)	50	102	0.3 (0.02-2.7)	24	48	-
			P = 0.099			P = 0.258			-
Frequent vegetable intake
No	6	2	1.0 (referent)	1	1	1.0 (referent)	0	1	-
Yes	111	232	0.2 (0.03-0.8)	51	102	0.5 (0.03-8.0)	24	47	-
			P = 0.028			P = 0.624			-
Steaming foods
No	92	190	1.0 (referent)	42	83	1.0 (referent)	21	40	1.0 (referent)
Yes	25	44	1.2 (0.7-2.1)	10	20	1.0 (0.4-2.3)	3	8	0.7 (0.2-3.0)
			P = 0.564			P = 1.00			P = 0.639
Frying foods
No	6	30	1.0 (referent)	3	9	1.0 (referent)	1	2	1.0 (referent)
Yes	111	204	2.6 (1.1-6.2)	49	94	1.6 (0.4-6.0)	23	46	1.0 (0.09-11.02)
			P = 0.038			P = 0.525			P = 1.000
Smoking foods
No	90	183	1.0 (referent)	35	80	1.0 (referent)	17	38	1.0 (referent)
Yes	27	51	1.1 (0.7-1.8)	17	23	1.7 (0.8-3.6 )	7	10	1.5 (0.5-4.2)
			P = 0.791			P = 0.173			P = 0.468
Cooking with oven
No	83	154	1.0 (referent)	37	73	1.0 (referent)	19	30	1.0 (referent)
Yes	34	80	0.8 (0.5-1.3)	15	30	1.0 (0.5-2.1)	5	18	0.4 (0.1-1.4)
			P = 0.301			P = 1.000			P = 0.153
Cooking with coal
No	57	141	1.0 (referent)	20	63	1.0 (referent)	11	31	1.0 (referent)
Yes	60	93	1.6 (1.0-2.6)	32	40	2.2 (1.2-4.2)	13	17	2.3 (0.8-6.9)
			P = 0.037			P = 0.014			P = 0.109
Roasting foods
No	46	89	1.0 (referent)	16	43	1.0 (referent)	6	15	1.0 (referent)
Yes	71	145	0.9 (0.6-1.5)	36	60	1.8 (0.8-3.8)	18	33	1.3 (0.5-3.9)
			P = 0.798			P = 0.131			P = 0.597
Cigarette smoking
Never	41	107	1.0 (referent)	20	44	1.0 (referent)	5	23	1.0 (referent)
Ex-smoker	47	68	1.9 (1.1-3.4)	22	41	1.2 (0.6-2.5 )	13	15	3.7 (1.1-12.5)
Current	29	59	1.3 (0.7-2.3)	10	18	1.3 (0.5-3.4 )	6	10	3.0 (0.6-13.9)
smoker
	P for trend = 0.257			P for trend = 0.597			P for trend = 0.083
	P for heterogeneity = 0.059			P for heterogeneity = 0.859			P for heterogeneity = 0.070

¹Information on birth order was missing in a patient with tumor in the lower third of the stomach and in 3 controls.