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Table 2 Meta-analysis of Fish Consumption and Gastric Cancer Risk

From: Fish consumption and the risk of gastric cancer: systematic review and meta-analysis

Category of Studies No. of Studies Summary OR or RR (95% CI) I2
All studies 17 0.87 (0.71-1.07) 73.3%
Case-control studies 15 0.85 (0.68-1.06) 76.0%
Population-based case-control studies 7 0.87 (0.60-1.27) 82.1%
Hospital-based case-control studies 8 0.82 (0.63-1.05) 56.3%
Population-based versus hospital-based case-control studies    0.0%
Cohort studies 2 1.11(0.77-1.62) 0.0%
Case-control versus cohort studies    31.4%
Western studies 9 0.92 (0.71-1.19) 80.1%
Eastern studies 8 0.80 (0.54-1.16) 64.3%
Western versus Eastern studies Mail assessment Interview versus mail assessment    0.0%
Interview assessment 15 0.82 (0.66-1.02) 69.7%
Mail assessment 2 1.26 (1.03-1.55) 0.0%
Interview versus mail assessment    73.3%
  1. Abbreviations: OR: Odd Risk, RR: Relative Risk; CI: Confidence Interval