In clinical research, the collected data cover quite of categorical variables.
在临床科研中，收集的数据中往往包含了一些分类变量。
Objective To sump up and extend COX regression model with categorical variables.
目的总结和推广包含分类变量的COX模型。
Simultaneously, categorical variables were compared with use of chi-square analysis.
同时使用卡方分析比较分类变量。
Categorical variables were assessed using relative risk and absolute risk reduction.
利用相对危险因子和绝对危险因子减少来评估类别差异。
Composed of those categorical variables, the enumeration data had to be correspondingly analyzed with special statistical methods on the ground of their design methods.
由这些变量组成的计数资料必须根据资料设计的特点，进行相应的统计学分析。
Composed of those categorical variables, the enumeration data had to be correspondingly analyzed with special statistical methods on the ground of their design methods.
由这些变量组成的计数资料必须根据资料设计的特点，进行相应的统计学分析。
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