应用病例-病例研究方法及SAS软件包进行因素分析。
The case-case study and SAS software were used for factor analysis.
方法：对10 6例散发性大肠癌患者进行多基因突变和肠道内环境中有关指标（以粪便为标本）的测定，并进行流行病学的病例-病例研究分析。
Methods:Mutations of multiple genes from 106 patients with SCC were analyzed by two multiplex PCR-SSCP systems, PCR-RFLP, and DNA sequencing.
根据研究中获取的麻疹病例数量和病死人数，我们计算了研究期间和2004年尼泊尔所有地区的麻疹病例数和病死人数。
From the number of measles cases and deaths found in the study we calculated the total number of measles cases and deaths for all of Nepal during the study period and in 2004.
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