Review of Prostatic Tumor Using Kaplan Meier and Cox Regression

The branch of statistics relative to analysis of predictable period of time until one or more event occurs is termed survival analysis. Survival analysis is a system of data collection and analysis where the outcome variable is the time until the event of an interest occurs [1]. The technique deals with the creation of timing data that goes with event of either failure or death. However the pattern of complete with incomplete data is a major characteristic of this technique because some people will experience the event of interest while others will not experience such event. This method of analysis is widely applied in different fields of studies. In the biological field, it could be considered as the death of organism prior a specific time and this is generally regarded as survival time analysis. In the engineering field, it is called reliability theory which analyses the failure of systems prior a stipulated time or period. In finance and economics, such analysis is called duration analysis while in the field of sociology, it is the event of history analysis [2,3].