. 2017 Sep 14;8(48):84459–84472. doi: 10.18632/oncotarget.20880

Table 3. Subgroup analysis for drinkers versus non-drinkers and the risk of gastric cancer.

Group	RR and 95% CI	P value	Heterogeneity (%)	P value for heterogeneity	Ratio between subgroups	P value for interaction test
Country
US or Europe	1.04 (0.89–1.21)	0.620	54.5	0.015	1.01 (0.86–1.18)	0.904
Asia	1.03 (1.00–1.06)	0.090	0.0	0.791	1.01 (0.86–1.18)	0.904
Sample size
≥ 10000	1.03 (1.00–1.06)	0.098	0.0	0.704	0.97 (0.76–1.25)	0.821
< 10000	1.06 (0.83–1.36)	0.658	61.2	0.012	0.97 (0.76–1.25)	0.821
Gender
Men	1.04 (0.97–1.12)	0.230	28.1	0.161	1.03 (0.79–1.33)	0.825
Women	1.01 (0.79–1.30)	0.945	2.4	0.380	1.03 (0.79–1.33)	0.825
Outcomes
GC incidence	1.05 (0.99–1.11)	0.135	24.5	0.177	1.04 (0.92–1.17)	0.521
GC mortality	1.01 (0.91–1.12)	0t.919	24.6	0.225	1.04 (0.92–1.17)	0.521
Adjusted BMI or not
Yes	1.02 (0.99–1.06)	0.152	1.2	0.432	0.94 (0.81–1.08)	0.358
No	1.09 (0.95–1.25)	0.206	37.5	0.083	0.94 (0.81–1.08)	0.358
Adjusted educational attainment
Yes	1.02 (0.93–1.12)	0.707	24.3	0.205	0.98 (0.88–1.09)	0.722
No	1.04 (0.99–1.10)	0.127	23.8	0.203	0.98 (0.88–1.09)	0.722
Adjusted physical activity
Yes	1.00 (0.95–1.07)	0.897	30.9	0.227	0.93 (0.85–1.02)	0.151
No	1.07 (0.99–1.14)	0.072	19.6	0.206	0.93 (0.85–1.02)	0.151