对杭州市区在１９８６年１月１日～１９８９年１２月３１日内被诊断的２４５例大肠癌进行了１∶１配对的病例对照研究。对所有调查因素都进行了单因素及多因素的统计分析，结果表明：饮酒史、饮自来水、慢性腹泻史、血便史及重体力活动与大肠癌有阳性联系，轻体力活动则有保护作用，以上因素均具有显著的统计学意义。 A 1:1 matched case-control study was performed on 245 cases of colorectal cancer diagnosed in Hangzhou from January 1, 1986 to December 31, 1989. A single-factor and multi-factor statistical analysis was performed on all investigated factors. The results showed that drinking history, drinking tap water, history of chronic diarrhea, history of blood diarrhea, and heavy physical activity were positively associated with colorectal cancer, and light physical activity had a protective effect. All of the above factors have significant statistical significance.