对９０９对病例对照的入户调查进行单因素和多因素分析。研究结果表明吸烟、空气污染、职业危害、肺部疾患既往史、不良心理等是肺癌的危险因素。而本次研究获得吸烟与肺癌死亡相对危险度的剂量效应关系，再次证明二者之间存在着因果关系。肝癌的危险因素有乙型肝炎病毒感染、饮水污染、家族史和社会心理因素等。乳腺癌的危险因素则有乳腺良性病史、职业接触、结婚年龄等。 A univariate and multivariate analysis was performed on 909 case-control households. The results of the study showed that smoking, air pollution, occupational hazards, past history of lung disease, and unhealthy psychological factors are risk factors for lung cancer. In this study, the dose-response relationship between the relative risk of smoking and lung cancer deaths was once again proven to be causal. The risk factors for liver cancer include hepatitis B virus infection, drinking water contamination, family history, and psychosocial factors. Risk factors for breast cancer include a history of benign breast disease, occupational exposure, and marriage age.