Statistics, Department of

 

Date of this Version

1999

Citation

J. Anim. Sci. Val. 77, Suppl. 2/J. Dairy Sci. Vol. 82, Suppl. 2/1999

Comments

Copyright 1999 American Society of Animal Science

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.

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