Table 2. Sensitivity analysis for drinkers vs non-drinkers.

Excluding study	RR and 95% CI	P value	Heterogeneity (%)	P value for heterogeneity
Gordon 1984	1.03 (0.98–1.08)	0.184	23.2	0.151
Gordon 1984	1.03 (1.00–1.07)	0.088	4.2	0.404
Kono 1987	1.03 (0.98–1.08)	0.208	24.0	0.142
Stemmermann 1990	1.03 (0.98–1.09)	0.217	24.7	0.134
Kato 1992	1.03 (0.98–1.08)	0.202	16.6	0.233
Galanis 1998	1.04 (0.99–1.08)	0.139	19.1	0.200
Fujino 2002	1.03 (0.98–1.09)	0.183	25.2	0.129
Fujino 2002	1.03 (0.98–1.08)	0.219	23.8	0.144
Sasazuki 2002	1.04 (0.98–1.09)	0.173	25.0	0.131
Barstad 2005	1.03 (0.98–1.08)	0.247	20.3	0.185
Nakaya 2005	1.03 (0.98–1.09)	0.179	25.1	0.130
Larsson 2006	1.03 (0.98–1.08)	0.212	22.2	0.163
Sjodahl 2006	1.03 (0.98–1.08)	0.214	23.0	0.153
Freedman 2007	1.04 (0.99–1.09)	0.084	15.3	0.249
Sung 2007	1.03 (0.98–1.09)	0.294	23.1	0.152
Kim 2010	1.04 (0.98–1.10)	0.210	24.5	0.136
Steevens 2010	1.04 (0.99–1.09)	0.130	22.8	0.155
Moy 2010	1.03 (0.98–1.09)	0.193	25.2	0.129
Kim 2010	1.04 (0.98–1.10)	0.219	25.2	0.130
Kim 2010	1.04 (0.99–1.09)	0.136	22.3	0.162
Duell 2011	1.03 (0.98–1.09)	0.201	25.1	0.130
Everatt 2012	1.03 (0.98–1.07)	0.232	15.2	0.251
Yang 2012	1.04 (0.99–1.10)	0.122	22.6	0.157
Jung 2012	1.03 (0.98–1.08)	0.197	24.7	0.134
Jayalekshmi 2015	1.03 (0.98–1.08)	0.222	21.7	0.168