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Activity Number: 76
Type: Contributed
Date/Time: Sunday, August 9, 2015 : 4:00 PM to 5:50 PM
Sponsor: Section on Statistics in Epidemiology
Abstract #317240
Title: Statistical Models to Study Variation in the Associations Between Food Store Availability and Body Mass Index Around Participant's Residential Locations in the MESA
Author(s): Jonggyu Baek* and Brisa Ney Sanchez and Loni Philip Tabb and Tonatiuh Barrientos-Gutierrez and Kari A. Moore and Jana A. Hirsch and Ana V. Diez-Roux
Companies: University of Michigan and University of Michigan and Drexel University School of Public Health and National Institute of Public Health and Drexel University School of Public Health and The University of North Carolina/Carolina Population Center and Drexel University School of Public Health
Keywords: built environment ; distributed lag model
Abstract:

Many studies have examined the link between neighborhood food store availability and obesity. Classic regression models that use food store counts within buffers of pre-specified size around participants' residences can yield biased or inefficient health effect estimates. We use longitudinal data from MESA obtained during 2000-2010 across six U.S. cities and distributed lag models (DLMs) to examine: (1) associations between favorable food store availability and body mass index (BMI) as a function of distance from participants' residences; (2) differences in these associations by participants' characteristics; and (3) cumulative associations of favorable food stores and BMI within 1 and 2 miles from participants' residences estimated from the DLM. We found that associations differ by city. Further, within New York, the association was modified by participant's age and distance: the association within 1 mile of participants' residence was not significant for younger participants, but was significant for older ones (-0.017; 95% CI -0.033,-0.002); within 2 miles, the associations were significant for both (younger: -0.009; 95% CI -0.016,-0.003; older: -0.018; 95% CI -0.028,-0.009).


Authors who are presenting talks have a * after their name.

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