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为全面评价D湖水污染和自来水氯化对健康的影响,作者对饮用D湖自来水的人群癌症危险度作了回顾性定群研究,研究发现。饮用W市D湖自来水的人群组男性癌症总死亡率明显高于长江水组人群,年龄分层估计RR=1.78,95％C.L=1.18～2.69,z=2.76,P<0.01。男性肝、胃和肠癌合计死亡率及女性肠癌死亡率明显高于长江水组。控制吸烟和职业等混杂因素后,结果与上述一致。D湖自来水管网末水总卤代烃浓度高于长江自来水,且前者非挥发性有机物Ames试验阳性,后者阴性。
In order to comprehensively evaluate the health effects of lake water pollution and tap water chlorination, the author made a retrospective study on the risk of cancer in drinking water from people in Lake D, and found that. The total male cancer death rate was significantly higher in the population of drinking water in Lake D in Lake W than in the Yangtze River water group. The age stratification estimated RR = 1.78,95%, C.L = 1.18-2.69, z = 2.76, P <0.01. The total mortality rate of male liver, stomach and intestine cancer and the death rate of female colon cancer were significantly higher than those of the Yangtze River water group. Control of smoking and occupation and other confounding factors, the results consistent with the above. The concentration of total halohydrocarbons in the terminal water of D Lake water pipe network was higher than that of the Yangtze River water, and the former Ames test of non-volatile organic compounds was positive, while the latter was negative.