text_1: 因此 , 两种 治疗 之间 的 主要 比较 采用 逻辑 斯谛 回归 方法 ( 随访 时间 是 对数 转换 的 偏移 变量 , 除此之外 无 其他 协 变量 ) 进行 , 并 采用 差异 的 标准 误 估计值 .
  
text_2: principal comparisons between treatments were therefore performed by logistic regression with follow @-@ up time included as a log @-@ transformed offset variable ( no other covariates were included ) , with the use of an estimated standard error for the difference .
  