Login | Register

Application of the Distributed Lag Models for Examining Associations Between the Built Environment and Obesity Risk in Children (QUALITY cohort)

Title:

Application of the Distributed Lag Models for Examining Associations Between the Built Environment and Obesity Risk in Children (QUALITY cohort)

Smyrnova, Anna ORCID: https://orcid.org/0000-0003-0740-0907 (2019) Application of the Distributed Lag Models for Examining Associations Between the Built Environment and Obesity Risk in Children (QUALITY cohort). Masters thesis, Concordia University.

[img]
Preview
Text (application/pdf)
Smyrnova_MSc_F2019.pdf - Accepted Version
Available under License Spectrum Terms of Access.
3MB

Abstract

Features of the neighbourhood environment are associated with physical activity and nutrition habits in children and may be a key determinant for obesity risk. Studies commonly use a fixed, pre-specified buffer size for the spatial scale to construct environment measures and apply traditional methods of linear regression to calculate risk estimates. However, incorrect spatial scales can introduce biases. Whether the spatial scale changes depending on a person’s age and sex is largely unknown. Distributed lag models (DLM) were recently proposed as an alternative methodology to fixed, pre-specified buffers. The DLM coefficients follow a smooth association over distance, and a pre-specification of buffer size is not required. Therefore, the DLMs may provide a more accurate estimation of association strength, as well as the point in which the association disappears or is no longer clinically meaningful.

Using a subsample of the QUALITY cohort (an ongoing longitudinal investigation of the natural history of obesity in Quebec youth, N=281, Mean(age)=9.6 at baseline), we aimed to apply the DLM to determine whether the association between the residential neighbourhood built environment (BE) and obesity risk in children differed depending on age and sex. A second objective aimed to compare the DLM model with that of a linear regression model (which used pre-specified circular buffer sizes).

Different distances of association between the Retail Food Environment and BMI z-score were obtained for 1st and 2nd follow-ups, which also varies by sex. No significant association between the Recreational Facilities Environment and MVPA were detected.

Divisions:Concordia University > Faculty of Arts and Science > Mathematics and Statistics
Item Type:Thesis (Masters)
Authors:Smyrnova, Anna
Institution:Concordia University
Degree Name:M. Sc.
Program:Mathematics
Date:4 July 2019
Thesis Supervisor(s):Kakinami, Lisa
Keywords:Children, body mass index, physical activity, neighbourhoods, built environment, food environment, recreational facilities, Geographic Information System (GIS), QUALITY cohort, distributed lag models
ID Code:985701
Deposited By: ANNA SMYRNOVA
Deposited On:15 Nov 2019 16:10
Last Modified:15 Nov 2019 16:10
All items in Spectrum are protected by copyright, with all rights reserved. The use of items is governed by Spectrum's terms of access.

Repository Staff Only: item control page

Downloads per month over past year

Research related to the current document (at the CORE website)
- Research related to the current document (at the CORE website)
Back to top Back to top