The Annals of Applied Statistics

Variable selection for a categorical varying-coefficient model with identifications for determinants of body mass index

Jiti Gao, Bin Peng, Zhao Ren, and Xiaohui Zhang

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Abstract

Obesity has become one of the major public health issues during the last three decades. A considerable number of determinants have been proposed for body mass index (BMI) by a large range of studies from multiple disciplines. In addition, it is well documented that impacts of these determinants are varying across demographic groups. However, little is known about the relative importance of these potential determinants and the varying impacts of all relatively important determinants. Using the shrinkage estimation technique, we propose a variable selection procedure for the categorical varying-coefficient model. We present a simulation study to exam performance of our method in different scenarios. We further apply the proposed method to examine the impacts of a large number of potential determinants on BMI using data from the 2013 National Health Interview Survey in the United States. By our method, the relevant determinants of BMI are identified through the variable selection procedure; and their varying impacts across demographic groups are quantified through the post-selection estimation.

Article information

Source
Ann. Appl. Stat., Volume 11, Number 2 (2017), 1117-1145.

Dates
Received: November 2016
Revised: February 2017
First available in Project Euclid: 20 July 2017

Permanent link to this document
https://projecteuclid.org/euclid.aoas/1500537737

Digital Object Identifier
doi:10.1214/17-AOAS1039

Mathematical Reviews number (MathSciNet)
MR3693560

Zentralblatt MATH identifier
06775906

Keywords
Body mass index obesity optimal variable selection varying-coefficient regression

Citation

Gao, Jiti; Peng, Bin; Ren, Zhao; Zhang, Xiaohui. Variable selection for a categorical varying-coefficient model with identifications for determinants of body mass index. Ann. Appl. Stat. 11 (2017), no. 2, 1117--1145. doi:10.1214/17-AOAS1039. https://projecteuclid.org/euclid.aoas/1500537737


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Supplemental materials

  • Supplement to “Variable selection for a categorical varying-coefficient model with identifications for determinants of body mass index”. In this supplementary file, we provide a detailed presentation and discussion on (1) mathematical proofs of the main results, (2) estimation procedure of our method, (3) extra simulation results, and (4) other estimation results from the BMI study.