Survival Analysis and Application in Livestock

Abstract

Life analysis is a collection of analysis methods used to examine the time elapsed until the emergence of any phenomenon identified by the researcher. In medical studies, such as clinical trials comparing two or more trials; time is taken as the beginning of the individual's participation in the experimental study. Life analysis is researched not only in the field of medicine but also in many branches such as economy, social life, zoology and botany. In this study, milk data of Damaskus hybrid and Pure Damaskus goat herd consisting of two different races were used to make an application of life analysis in livestock field. In milk goatness, the life expectancy of the Damaskus hybrid and Pure Damaskus breeds in milk yield was analyzed by Kaplan-Meier test. IBM SPSS Statistic 23 package program was used for data analysis. As a result, it was seen that the length of life of the pure damask race on milk yield was longer than the Damaskus hybrid race. In other words, the results of the Log-rank test statistics for the data obtained as a result of the study were significant according to the significance level of 0.05. In addition, according to Kaplan-Meier life analysis hypothesis, the mean life milk yield age was different between the groups.