Author/Editor		Kipourou, Dimitra-Kleio; Pohar Perme, Maja; Rachet, Bernard; Belot, Aurelien
Title		Direct modeling of the crude probability of cancer deathand the number of life years lost due to cancer withoutthe need of cause of death
Type		članek
Publication year		2020
Volume		str. str.
ISSN		1465-4644 - Biostatistics (Oxford, England)
Language		eng
Abstract		In population-based cancer studies, net survival is a crucial measure for population comparison purposes. However, alternative measures, namely the crude probability of death (CPr) and the number of life years lost (LYL) due to death according to different causes, are useful as complementary measures for reflecting different dimensions in terms of prognosis, treatment choice, or development of a control strategy. When the cause of death (COD) information is available, both measures can be estimated in competing risks setting using either cause-specific or subdistribution hazard regression models or with the pseudo-observation approach through direct modeling. We extended the pseudo-observation approach in order to model the CPr and the LYL due to different causes when information on COD is unavailable or unreliable (i.e., in relative survival setting). In a simulation study, we assessed the performance of the proposed approach in estimating regression parameters and examined models with different link functions that can provide an easier interpretation of the parameters. We showed that the pseudo-observation approach performs well for both measures and we illustrated their use on cervical cancer data from the England population-based cancer registry. A tutorial showing how to implement the method in R software is also provided.
Keywords		probability of death number of life years lost relative survival verjetnost smrti število izgubljenih let življenja relativno preživetje