text_1: 来自 随机对照 试验 的 合并 估计值 提示 , 全 髋关节 置换术 后 的 脱位 风险 是 股骨头 置换术 后 的 2.5 倍 ( 9% vs . 3% ; 相对 危险度 , 2.53 ; 95% CI , 1.05 ~ 6.10 ) 5 .
  
text_2: pooled estimates from randomized , controlled trials suggest a risk of dislocation after total hip arthroplasty that is more than 2.5 times as great as that associated with hemiarthroplasty ( 9 % vs. 3 % ; relative risk , 2.53 ; 95 % CI , 1.05 to 6.10 ) .5
  