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Non-Parametric Survival Models

H.Alexis Selvaraj,G.Stephen Vincent

Published in:   Vol. 3 Issue 3 Date of Publication:   December 2014
Page(s):   232-235 Publisher:   Integrated Intelligent Research (IIR)
DOI:   10.20894/IJCOA. SAI : 2014SCIA316F0846

Statistical models include issues such as statistical characterization of numerical data, estimating the probabilistic future behaviour of a system based on past behaviour, extrapolation or interpolation of data based on some best-fit, error estimates of observations or model generated output. If the statistical model is used to analyse the survival data it is known as statistical model in survival analysis. There are different statistical data. Censored data is one of its kinds. Censoring means the actual survival time is unknown. Censoring may occur when a person does not experience the event before the study ends or lost to follow-up during the study period or withdraws from the study. For this type of censored data the suitable model is survival models. Survival models are classified as non-parametric, semi-parametric and parametric models. The survival probability can be obtained using these models. Using the health data of cancer registry in Tiruchirappalli, Tamil Nadu , a study on survival pattern of cancer patients was explored, the non-parametric modelling that is Kaplan-Meier method was used to estimate the survival probability and the comparison of survival probability of obtained by life table and Kaplan Meier methods for each stage of the disease were made. Log rank test has been used for the comparison between the estimates obtained at the different stages of the disease.