设计：非随机化同期对照分析。
设计：非随机化同期对照实验。
设计：非随机化同期对照观察。
设计非随机化临床试验。
设计：非随机化同期对照的回顾性分析，盲法评估。
DESIGN: Non - randomized and concurrently controlled retrospective analysis wi th blind evaluation.
设计：以诊断为依据的非随机化同期对照研究。单位：中山大学附属第一医院康复医学科。
DESIGN: Non - randomized case controlled study based on diagnosis SETTING: Rehabilitation Medicine Department of First Affiliated Hospital of Sun Yat - sen University.
目的提出一种适用于非随机化医学研究的，结合倾向指数与非参数生存分析估计风险比的方法。
Objective Propose a method that combines the propensity score approach and non-parametric survival analysis for hazard ratio estimation in non-randomized medical researches.
在随机化后的第一年内，66例安排进行非手术治疗的患者中，17 例（26%）患者进行了手术治疗，同时也有1 例分配到手术组 的患者拒绝手术也进行了非手术治疗。
In the rst year after randomization, 17 of the 66 patients (26%) assigned to non-operative treatment underwent surgery while 1 patient assigned to surgery refused and was treated nonoperatively.
在随机化后的第一年内，66例安排进行非手术治疗的患者中，17 例（26%）患者进行了手术治疗，同时也有1 例分配到手术组 的患者拒绝手术也进行了非手术治疗。
In the rst year after randomization, 17 of the 66 patients (26%) assigned to non-operative treatment underwent surgery while 1 patient assigned to surgery refused and was treated nonoperatively.
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