Skip to main content

Table 2 Subgroup analyses of relative risk of gastric cancer

From: Coffee consumption and the risk of gastric cancer: a meta-analysis of prospective cohort studies

  No of reports Relative risk (95 % CI) I 2 P for heterogeneity
Sex  
 Men 8 1.17 0.88–1.55 37.10 % 0.133
 Women 7 0.96 0.58–1.58 59.20 % 0.023
 Combined 5 1.21 0.96–1.51 0.00 % 0.604
Study quality      
 Score > 7 13 1.10 0.85–1.43 47.10 % 0.030
 Score ≤ 7 7 1.20 0.94–1.53 20.10 % 0.276
Study location      
 United States 5 1.36 1.06–1.75 0.00 % 0.536
 Europe 10 1.08 0.80–1.45 56.80 % 0.013
 Asia 5 0.92 0.66–1.28 0.00 % 0.532
Follow-up duration      
 ≤10 year 5 1.25 1.01–1.55 0.00 % 0.493
 >10 year 15 1.06 0.82–1.37 47.10 % 0.022
Reference group      
 None 8 1.10 0.81–1.49 17.30 % 0.294
 Low consumption 12 1.13 0.89–1.42 49.60 % 0.026
Specific dietary assessment method      
 Yes 11 1.10 0.87–1.38 41.50 % 0.072
 No 9 1.17 0.85–1.61 40.30 % 0.099
Controlling age in models      
 Yes 17 1.15 0.95–1.39 36.90 % 0.064
 No 3 0.88 0.42–1.85 61.90 % 0.073
Controlling smoking in models      
 Yes 13 1.06 0.84–1.33 43.80 % 0.046
 No 7 1.29 0.97–1.71 21.80 % 0.263
Controlling BMI in models  
 Yes 9 1.06 0.81–1.40 46.80 % 0.058
 No 11 1.19 0.92–1.53 33.70 % 0.129
Controlling alcohol intake in models      
 Yes 9 1.20 0.91–1.59 59.20 % 0.012
 No 11 1.09 0.86–1.37 6.70 % 0.380
Controlling tea consumption in models      
 Yes 6 1.09 0.74–1.62 67.60 % 0.009
 No 14 1.18 0.97–1.43 13.00 % 0.310
Statistical model*      
 Unadjusted 4 0.94 0.56–1.57 45.20 % 0.140
 Adjusted 17 1.15 0.95–1.39 36.90 % 0.064
  1. Abbreviations: BMI body mass index
  2. *Study by Nilsson and colleagues reported results both statistical models for adjusted and unadjusted