Journal
SPATIAL AND SPATIO-TEMPORAL EPIDEMIOLOGY
Volume 21, Issue -, Pages 13-23Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.sste.2017.02.001
Keywords
Mediation analysis; Obesity; Physical activity; Racial disparity
Categories
Funding
- National Cancer Institute (NCI) [R01 CA157565]
- Louisiana State University Health Sciences Center
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Research shows a consistent racial disparity in obesity between white and black adults in the United States. Accounting for the disparity is a challenge given the variety of the contributing factors, the nature of the association, and the multilevel relationships among the factors. We used the multivariable mediation analysis (MMA) method to explore the racial disparity in obesity considering not only the individual behavior but also geospatially derived environmental risk factors. Results from generalized linear models (GLM) were compared with those from multiple additive regression trees (MART) which allow for hierarchical data structure, and fitting of nonlinear and complex interactive relationships. As results, both individual and geographically defined factors contributed to the racial disparity in obesity. MART performed better than GLM models in that MART explained a larger proportion of the racial disparity in obesity. However, there remained disparities that cannot be explained by factors collected in this study. (C) 2017 Elsevier Ltd. All rights reserved.
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