Table 4.

Factors related to GC risk- results of histology specific analysis

	Histological type
	Intestinal			Diffuse
	Case	Control	OR (95% CI)	Case	Control	OR (95% CI)
Birth order 1
1	21	43	1.0 (referent)	16	58	1.0 (referent)
2+	65	125	1.1 (0.6-2.0)	70	116	2.0 (1.1-3.8)
			P = 0.876			P = 0.026
Salting meals before tasting
No	79	165	1.0 (referent)	79	172	1.0 (referent)
Yes	7	6	2.3 (0.8-6.9)	8	2	8.0 (1.7-37.7)
			P = 0.128			P = 0.009
Frequent fruit intake
No	4	1	1.0 (referent)	2	3	1.0 (referent)
Yes	82	170	0.1 (0.01-1.1)	85	171	0.8 (0.1-4.5)
			P = 0.063			P = 0.753
Frequent vegetable intake
No	4	2	1.0 (referent)	3	2	1.0 (referent)
Yes	82	169	0.2 (0.05 -1.4)	84	172	0.3 (0.1-2.0)
			P = 0.109			P = 0.229
Steaming foods
No	77	138	1.0 (referent)	64	139	1.0 (referent)
Yes	9	33	0.5 (0.2-1.1)	23	35	1.3 (0.8-2.5)
			P = 0.070			P = 0.263
Frying foods
No	4	14	1.0 (referent)	3	21	1.0 (referent)
Yes	82	157	1.8 (0.6-5.3)	84	153	3.7 (1.1-12.5)
			P = 0.324			P = 0.038
Smoking foods
No	65	132	1.0 (referent)	63	135	1.0 (referent)
Yes	21	39	1.1 (0.6-2.0)	24	39	1.3 (0.7-2.3)
			P = 0.792			P = 0.374
Cooking with oven
No	64	110	1.0 (referent)	61	117	1.0 (referent)
Yes	22	61	0.6 (0.3-1.1)	26	57	0.9 (0.5-1.6)
			P = 0.101			P = 0.617
Cooking with coal
No	37	108	1.0 (referent)	43	101	1.0 (referent)
Yes	49	63	2.2 (1.3-3.8)	44	73	1.4 (0.8-2.4)
			P = 0.003			P = 0.190
Roasting foods
No	30	70	1.0 (referent)	31	64	1.0 (referent)
Yes	56	101	1.4 (0.8-2.5)	56	110	1.1 (0.6-1.9)
			P = 0.282			P = 0.841
Cigarette smoking
Never	32	72	1.0 (referent)	30	88	1.0 (referent)
Ex-smoker	37	58	1.5 (0.8-2.6)	35	52	2.1 (1.1-4.0)
Current smoker	17	41	0.9 (0.4-1.9)	22	34	2.0 (1.0-4.2)
	P for trend = 0.931			P for trend = 0.027
	P for heterogeneity = 0.340			P for heterogeneity = 0.032

¹ Information on birth order was missing in a patient with diffuse-type GC and in 3 controls.