text_1: 对于 失访 患者 , 我们 在 24 个 月 随访 或 最后 一次 随访 时 将 患者 数据 删失 .
  
text_2: data for a given patient were censored at 24 months of follow @-@ up or at the time of the last follow @-@ up for patients who were lost to follow @-@ up .
  