目的实例介绍倾向评分法的基本原理和适用条件，设计适用于分析二分类资料的SAS宏程序。
Objective Through introduction of principal theory and algorithm of propensity score to design SAS macro programs for binary data.
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目的解决二分类反应资料危险度指标区间估计问题。
Objective To solve the problem of estimation for risk data.
二分类数据不应作计数资料处理。
Count data should not be treated they are dichotomous data.
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