Table 3. Stratified Analysis of dairy products or milk Intake and gastric cancer Risk.

Group	NO. of studies	OR(95%CI)	Q statistic	P value	I2 value(%)
Total Dairy products	26	1.09(0.96–1.25)	105.22	<0.001	76.2
Design
Cohort	8	1.01(0.91–1.13)	7.13	0.416	1.8
Case-control	18	1.10(0.92–1.30)	95.42	<0.001	82.2
Hospital based	9	0.86(0.72–1.02)	12.19	0.143	34.4
Population based	9	1.36(1.07–1.74)	63.26	<0.001	87.4
Geographic area
Asia	10	1.09(0.86–1.38)	72.34	<0.001	87.6
Europe	7	0.91(0.76–1.08)	6.63	0.356	9.6
North America	7	1.18(1.01–1.38)	8.73	0.189	31.3
South America	2	1.45(0.54–3.89)	9.14	0.003	89.1
Lauren's classification
Diffuse	4	1.04(0.87–1.24)	2.58	0.461	0
Intestinal	4	1.13(0.79–1.62)	9.15	0.027	67.2
Location
Cardia	3	1.32(0.84–2.08)	25.74	<0.001	92.2
Noncardia	3	1.21(0.95–1.54)	10.98	0.004	81.8
Gender
Men	9	1.04(0.96–1.13)	13.19	0.587	0
Women	8	1.02(0.95–1.09)	10.59	0.751	0
Adjustment for confounders
Alcohol Yes	7	1.18(0.96–1.25)	10.65	0.1	43.6
No	19	1.18(0.98–1.42)	92.75	<0.001	80.6
Smoking Yes	15	1.10(0.96–1.25)	27.34	0.017	48.8
No	11	1.07(0.83–1.39)	77.73	<0.001	87.1
BMI Yes	5	1.13(1.01–1.26)	1.71	0.798	0
No	21	1.09(0.93–1.29)	102.92	<0.001	80.6
Total energy intake Yes	10	1.22(1.02–1.46)	22.83	0.007	60.6
No	16	1.01(0.83–1.23)	82.11	<0.001	81.7
H. pylori infection Yes	2	1.43(0.65–3.15)	6.46	0.011	84.5
No	24	1.08(0.93–1.25)	98	<0.001	76.5
Publication year
Before 2000	9	1.10(0.90–1.34)	18.83	0.016	57.4
After 2000	17	1.08(0.91–1.29)	86.30	<0.001	81.5
Quality score
<7 stars	8	1.11(0.75–1.65)	65.81	<0.001	89.4
≥7 stars	18	1.05(0.95–1.16)	28.70	0.037	40.8
Fermented(Yes vs. No)
Non-Fermented	13	1.10(0.92–1.32)	30.68	0.01	51.1
Fermented	8	0.94(0.81–1.08)	15.42	0.42	2.7
Milk
Asia	5	0.90(0.75–1.08)	7.64	0.501	0
Europe	5	1.57(1.01–2.44)	8.71	0.126	51.8
North America	3	1.68(0.90–3.14)	4.15	0.069	54.1
Hawaii	2	1.11(0.85–1.44)	0.45	0.106	47.6
Cheese
Asia	3	1.05(0.72–1.54)	0.35	0.840	0
Europe	4	0.75(0.52–1.08)	9.19	0.027	67.4

Non-Fermented: milk; Fermented: cheese, yogurt, sour milk;