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- W2037438324 abstract "Summary In some survival analysis of medical studies, there are often long-term survivors who can be considered as permanently cured. The goals in these studies are to estimate the noncured probability of the whole population and the hazard rate of the susceptible subpopulation. When covariates are present as often happens in practice, to understand covariate effects on the noncured probability and hazard rate is of equal importance. The existing methods are limited to parametric and semiparametric models. We propose a two-component mixture cure rate model with nonparametric forms for both the cure probability and the hazard rate function. Identifiability of the model is guaranteed by an additive assumption that allows no time–covariate interactions in the logarithm of hazard rate. Estimation is carried out by an expectation–maximization algorithm on maximizing a penalized likelihood. For inferential purpose, we apply the Louis formula to obtain point-wise confidence intervals for noncured probability and hazard rate. Asymptotic convergence rates of our function estimates are established. We then evaluate the proposed method by extensive simulations. We analyze the survival data from a melanoma study and find interesting patterns for this study." @default.
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- W2037438324 date "2011-12-14" @default.
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- W2037438324 title "Two-Component Mixture Cure Rate Model with Spline Estimated Nonparametric Components" @default.
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- W2037438324 doi "https://doi.org/10.1111/j.1541-0420.2011.01715.x" @default.
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