方法：采用二阶段抽样法对254名51～75岁居民用多因素分析法进行了调查分析。

Method:254 people aged 51~75 with two stage sampling were investigated by using multifactor analyses.

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方法：采用二阶段抽样法对254名51～75岁居民用多因素分析法进行了调查分析。

Method:254 people aged 51~75 with two stage sampling were investigated by using multifactor analyses.

youdao