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Applications in Survival Analysis^1,2,

Department of Biometry, University of Nebraska-Lincoln, Lincoln 68583-0712

Abstract

Survival or failure time traits such as herd life and days open are both important economically and pose a number of challenges to an analysis based on linear mixed models. The main features of a survival trait are that it is the time until some event occurs, and some of the observations are censored. Survival models and the associated estimation procedures provide a flexible means of modeling survival traits. In this paper I will discuss the application of survival analysis based on the Weibull distribution. The components that make up a survival model will be presented along with their interpretation. Issues related to the model construction and estimation will be presented.

¹ Presented at the 1998 ADSA/ASAS meeting in Denver, Colorado.

² This manuscript has been assigned Journal Series No. 12524, Agricultural Research Division Office.

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