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Table 3 Subgroup analysis for sex difference of gastric cancer (current smoker versus never smoker)

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

Group RRR and 95% CI P value Heterogeneity (%) P value for heterogeneity P value for interaction test
Publication year
 2000 or after 1.27 (0.93–1.74) 0.130 60.6 0.027 0.921
 Before 2000 1.32 (0.89–1.96) 0.172 38.2 0.183
Country
 Asia 1.50 (1.17–1.91) 0.001 40.2 0.171 0.306
 Europe or US 1.12 (0.77–1.64) 0.548 58.2 0.035
Follow-up duration (years)
 10 or greater 1.33 (1.02–1.74) 0.037 44.7 0.143 0.573
  < 10 1.46 (1.11–1.91) 0.006 22.4 0.272
Outcomes
 GC incidence 0.92 (0.66–1.29) 0.628 16.5 0.309 0.023
 GC mortality 1.53 (1.24–1.89) < 0.001 39.3 0.143
Adjusted BMI or not
 Yes 1.07 (0.53–2.15) 0.848 68.0 0.025 0.527
 No 1.47 (1.24–1.74) < 0.001 20.2 0.286
Adjusted alcohol consumption
 Yes 0.99 (0.61–1.61) 0.971 49.6 0.114 0.331
 No 1.53 (1.20–1.94) 0.001 50.2 0.090
NOS score
 7 or 8 1.42 (1.11–1.81) 0.005 43.4 0.101 0.169
  < 7 0.91 (0.41–2.02) 0.814 62.7 0.068