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目的:观察林县居民饮用深机井水后食管癌发病率的变化。方法:选择饮用深井水和非深井水的村庄各27个,连续观察8～14年食管癌发病情况并进行比较。结果:饮用深井水组和非深井水组食管癌发病率均有所下降,二组食管癌发病率分别下降18.74/10万和23.50/10万,食管癌标化发病率分别下降15.26/10万和13.58/10万,而贲门癌发病率无明显变化。结论:食管癌发病率的下降与深井水的水质无关,而可能是饮水卫生条件改善,居民生活水平提高,营养好转的结果,提示食管癌是综合病因。
Objective: To observe the changes in the incidence of esophageal cancer after drinking water from deep wells in Linxian residents. METHODS: Twenty-seven villages with deep wells and non-deep wells were selected and the incidence of esophageal cancer was observed continuously for 8 to 14 years and compared. RESULTS: The incidence of esophageal cancer in the deep-well drinking water group and the non-deep well water group decreased. The incidence of esophageal cancer in the two groups decreased by 18.74/100,000 and 23.50/100,000 respectively. The incidence of esophageal cancer normalized rate dropped by 15.26/100,000 respectively. And 13.58/10 million, but no significant change in the incidence of cardiac cancer. Conclusion: The decrease of the incidence of esophageal cancer has nothing to do with the quality of deep well water, but it may be the improvement of sanitation conditions of drinking water, the improvement of living standards of residents, and the improvement of nutrition, suggesting that esophageal cancer is a comprehensive cause.