Data-driven choice of a model selection method in joinpoint regression

Hyune-Ju Kim, Huann-Sheng Chen, Douglas Midthune, Bill Wheeler, Dennis W. Buckman, Donald Green, Jeffrey Byrne, Jun Luo and Eric J. Feuer

Journal of Applied Statistics, 2023, vol. 50, issue 9, 1992-2013

Abstract: Selecting the number of change points in segmented line regression is an important problem in trend analysis, and there have been various approaches proposed in the literature. We first study the empirical properties of several model selection procedures and propose a new method based on two Schwarz type criteria, a classical Bayes Information Criterion (BIC) and the one with a harsher penalty than BIC ( $ \hbox {BIC}_3 $ BIC3). The proposed rule is designed to use the former when effect sizes are small and the latter when the effect sizes are large and employs the partial $ R^2 $ R2 to determine the weight between BIC and $ \hbox {BIC}_3 $ BIC3. The proposed method is computationally much more efficient than the permutation test procedure that has been the default method of Joinpoint software developed for cancer trend analysis, and its satisfactory performance is observed in our simulation study. Simulations indicate that the proposed method performs well in keeping the probability of correct selection at least as large as that of $ \hbox {BIC}_3 $ BIC3, whose performance is comparable to that of the permutation test procedure, and improves $ \hbox {BIC}_3 $ BIC3 when it performs worse than $ \hbox {BIC}. $ BIC. The proposed method is applied to the U.S. prostate cancer incidence and mortality rates.

Date: 2023
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DOI: 10.1080/02664763.2022.2063265

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