Opelz G, Mickey M R, Terasaki P I
Transplantation. 1975 Mar;19(3):226-9. doi: 10.1097/00007890-197503000-00005.
Human kidney transplant survival rates at 1 year were compared among centers according to the transplantation activity as measured by the number of renal transplants performed. Statistical methods are described by which a fair assessment can be made of the outcome when small numbers of grafts are involved. The method should also be useful in evaluating subsets of patients in any given center under different treatment protocols. No evidence was found that survival rates of cadaver donor transplants were lower at the smaller centers. Other factors besides size of centers are probably of greater importance in influencing transplant survival rates.
根据肾脏移植数量衡量的移植活动，对各中心1年时的人类肾移植存活率进行了比较。文中描述了一些统计方法，当涉及少量移植时，可据此对结果进行合理评估。该方法在评估任何给定中心不同治疗方案下的患者亚组时也应有用。未发现证据表明较小中心的尸体供体移植存活率较低。除中心规模外，其他因素可能对影响移植存活率更为重要。
