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 | Â | ||||
 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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 ≤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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 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 | Â | ||||
 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 | Â | Â | Â | Â | Â |
 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 | Â | Â | Â | Â | Â |
 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* | Â | Â | Â | Â | Â |
 Unadjusted | 4 | 0.94 | 0.56–1.57 | 45.20 % | 0.140 |
 Adjusted | 17 | 1.15 | 0.95–1.39 | 36.90 % | 0.064 |