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Table 2 Sensitivity analysis for sex difference of gastric cancer (current smoker versus never smoker and former smoker versus never smoker)

From: Smoking status and subsequent gastric cancer risk in men compared with women: a meta-analysis of prospective observational studies

Outcomes Excluding study RRR and 95% CI P value Heterogeneity (%) P value for heterogeneity
Current smoker versus never smoker JACC 2005 1.27 (1.01–1.61) 0.045 56.8 0.018
Kato 1992 1.30 (1.03–1.63) 0.026 57.8 0.015
Tverdal 1993 1.27 (1.04–1.57) 0.022 47.8 0.053
Engeland 1996 1.34 (1.06–1.70) 0.015 54.5 0.024
Lindblad 2005 1.38 (1.15–1.66) 0.001 35.7 0.132
Jee 2004 1.22 (0.97–1.53) 0.089 38.1 0.114
Chao 2002 1.27 (0.97–1.66) 0.080 57.4 0.016
Akiba 1990 1.30 (0.98–1.73) 0.068 55.1 0.023
Gonzalez 2003 1.34 (1.06–1.69) 0.014 55.0 0.023
Nomura 2012 1.33 (1.04–1.70) 0.023 56.1 0.020
Former smoker versus never smoker JACC 2005 1.20 (0.90–1.59) 0.220 48.4 0.060
Kato 1992 1.20 (0.92–1.58) 0.175 46.9 0.068
Tverdal 1993 1.20 (0.91–1.58) 0.187 47.7 0.063
Engeland 1996 1.15 (0.87–1.53) 0.332 47.7 0.063
Lindblad 2005 1.31 (1.10–1.57) 0.002 5.7 0.386
Jee 2004 1.10 (0.78–1.56) 0.592 46.2 0.072
Chao 2002 1.17 (0.83–1.64) 0.364 46.0 0.073
Gonzalez 2003 1.26 (0.96–1.64) 0.095 40.8 0.107
Nomura 2012 1.11 (0.85–1.44) 0.445 28.8 0.199