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- W4302029042 abstract "We propose a novel two-stage procedure for change point detection and parameter estimation in a multi-threshold proportional hazards model. In the first stage, we estimate the number of thresholds by formulating the threshold detection problem as a variable selection problem and applying the penalized partial likelihood approach. In the second stage, the change point locations are refined by a grid search and the standard inference for segment regression can then follow. The proposed model and estimation procedure could lend support to subgroup identification and personalized treatment recommendation in medical research. We establish the consistency of the threshold estimators and regression coefficient estimators under technical conditions. The finite sample performance of the method is demonstrated via simulation studies and two cancer data examples." @default.
- W4302029042 created "2022-10-06" @default.
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- W4302029042 date "2022-10-05" @default.
- W4302029042 modified "2023-10-03" @default.
- W4302029042 title "Multi‐threshold proportional hazards model and subgroup identification" @default.
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- W4302029042 doi "https://doi.org/10.1002/sim.9589" @default.
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