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胃癌高发现场长乐县漳港乡１６年定群回顾性调查资料表明，饮用河水人群其胃癌死亡率为１２４．０５／１０万，明显高于井水组７４．８５／１０万（Ｐ＜０．０１）。在平衡饮食、吸烟、饮酒等因素后，７个沿海乡镇调查结果，饮用河水、井水、自来水组胃癌死亡率依次为８６．０３／１０万、６３．０３／１０万、２９．７８／１０万（Ｐ均＜０．０１）。本文同时对改水效应作了评价，饮用河水、井水与改饮自来水后人群胃癌死亡率的比较均呈明显下降趋势（Ｐ＜０．０５，＜０．０１），此结果为胃癌高发现场干预措施提供了理论依据。
The retrospective survey data of the 16-year-old population of Gaogang County, Changle County, Gansu Province, showed that the mortality rate of gastric cancer in drinking water population was 124.05/100,000, which was significantly higher than that of well water group (74.85/100,000) (P<0. 01). After a balanced diet, smoking, and alcohol consumption, the results of seven coastal township surveys showed that the mortality of gastric cancer in drinking river water, well water, and tap water was 86.03 per 100,000, 63.03 per 100,000, and 29.78/10 respectively. Million (P all <0.01). At the same time, the effect of water improvement was evaluated. The mortality rate of gastric cancer after drinking river water, well water, and drinking water changed significantly (P<0.05, <0.01). This result is a high risk area for gastric cancer. Interventions provide a theoretical basis.