Statistical Note on the Survival Analysis. |
Jae Kyun Kim, Dae Chul Suh |
1Department of Radiology, Seoul Veterans Hospital, Korea. dcsuh@amc.seoul.kr 2Department of Radiology and Research Institute of Radiology, Asan Medical Center, University of Ulsan, College of Medicine, Korea. |
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Abstract |
This brief note describes the principles of survival analysis. Survival analysis is method for studying the time between entry to a study and a subsequent event and is used frequently in neurointervention studies. Kaplan-Meier estimator is nonparametric method for estimating the survival curve and log rank test is used for comparing between exposure and non-exposure groups. Proportional hazards model, a semi-parametric regression model specifically developed for censored data, is used when there are many exposure variables. |
Key Words:
Survival analysis; Statistical methods; Kaplan-Meier; Cox regression |
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