Results Through the chi-square test and conditional Logistic regression analysis,the results showed that high consumption of duck eggs,lard and beef were risk factors for colorectal cancer.

• 结果对研究因素进行了单因素及多因素的统计分析，结果表明：与大肠癌有直接关联的危险因素有鸭蛋、猪油、牛肉。