期刊
ANNALS OF THORACIC SURGERY
卷 93, 期 5, 页码 1416-1425出版社
ELSEVIER SCIENCE INC
DOI: 10.1016/j.athoracsur.2011.12.094
关键词
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Survival is an end point of immense interest in cardiothoracic research. In observational studies, the comparison of survival between groups of patients is usually accomplished using a toolbox that includes Kaplan-Meier survival curves and the Cox model. The Cox model yields comparisons between groups adjusted for case-mix differences, whereas the Kaplan-Meier is a plot of survival over time without adjustment. During the past decade, new methods have emerged for case-mix adjustment of survival curves and are increasingly being used in cardiothoracic research. The purpose of this report is to describe, illustrate, and review several approaches to case-mix adjusted survival (or event-free) curves. (Ann Thorac Surg 2012;93:1416-25) (c) 2012 by The Society of Thoracic Surgeons
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