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@proceedings{1131140, author = {Opršalová, Kateřina and Holčík, Jiří}, booktitle = {ISCAMI 2013, Book of Abstracts}, keywords = {survival analysis; parametric methods; probability distributions}, language = {eng}, title = {New Approach to a Parametric Regression in Survival Analysis}, year = {2013} }
TY - CONF ID - 1131140 AU - Opršalová, Kateřina - Holčík, Jiří PY - 2013 TI - New Approach to a Parametric Regression in Survival Analysis KW - survival analysis KW - parametric methods KW - probability distributions N2 - Parametric methods are not used so often due to a necessity to estimate the baseline hazard function. It is required to specify the probability distribution of the survival times when dealing with the methods. Unlike the Cox semiparametric model the assumption of proportional hazards need not to be fulfilled. That makes the parametric methods useful in some special cases. Exponential, Weibull, gamma and lognormal distributions are the most frequently used in the methods. All of this distributions are defined to infinity that causes overestimation of the probability of survival in longer survival times. We decided to transform standardly used distributions to be defined in a finite interval. The newly obtained distributions were formated and applied to the data of patients with breast cancer in the fourth stage of the disease. The maximum likelihood method was used to estimate the distributions parameters. Various models were compared visually and on the basis of Akaike information criterion. ER -
OPRŠALOVÁ, Kateřina a Jiří HOLČÍK. New Approach to a Parametric Regression in Survival Analysis. In \textit{ISCAMI 2013, Book of Abstracts}. 2013.
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