Among these risk factors, a clear trend of increased risk was observed for alcohol consumption and smoking (linear trend test P <0.0001 for both variables).
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The sentences
Salt preference and alcohol consumption had were marginally significant (< 0.1; these variables were thus included in the model), and meal regularity and physical activity had no effect on gastric cancer incidence in women.
Similar results were found for men, and only meal regularity had marginal significance.