通过辽宁省各县胃癌标化死亡率(3年),进行泊松分布配合,表明有高低发区。高发区为酸性棕壤,pH<6.0,饮水NO_3~-36.0～70.0 mg/L;低发区为草甸土pH>8.0,NO_3~-0.72～3.52mg/L。高发区在饮食行为:进食速度快、生气进餐、吃霉变粮、粥中加碱、高盐食品的比例,均明显高于低发区,其中咸肉、臭(米查)子为高发区特有食品。 Through the standardized mortality rate of gastric cancer in three counties in Liaoning Province (three years), the Poisson distribution was coordinated, indicating that there were high and low incidence areas. High-incidence areas were acidic brown soils, pH<6.0, drinking water NO_3~-36.0～70.0 mg/L; low incidence areas were meadow soil pH>8.0, NO_3~-0.72~3.52mg/L. The eating habits of the high-risk area: the proportion of fast-food intake, high-risk eating, mildew-eating foods, alkali-added and high-salt foods in porridge are all significantly higher than those in low-incidence areas, among which bacon and odor (michao) are high-risk areas. Unique food.