text_1: 最初 被 分配 接受 全 髋关节 置换术 的 54 例 ( 7.5% ) 患者 接受 了 股骨头 置换术 , 最初 被 分配 接受 股骨头 置换术 的 21 例 ( 2.9% ) 患者 接受 了 全 髋关节 置换术 ( P < 0.001 ) .
  
text_2: a total of 54 patients ( 7.5 % ) who had originally been assigned to total hip arthroplasty received hemiarthroplasty , and 21 ( 2.9 % ) who had originally been assigned to hemiarthroplasty received total hip arthroplasty ( P < 0.001 ) .
  