lunes, 6 de octubre de 2014

Preventing Chronic Disease | Characteristics of the Built Environment in Relation to Objectively Measured Physical Activity Among Mexican Adults, 2011 - CDC

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Preventing Chronic Disease | Characteristics of the Built Environment in Relation to Objectively Measured Physical Activity Among Mexican Adults, 2011 - CDC



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Characteristics of the Built Environment in Relation to Objectively Measured Physical Activity Among Mexican Adults, 2011

Deborah Salvo, PhD; Rodrigo S. Reis, PhD; Areyh D. Stein, PhD; Juan Rivera, PhD; Reynaldo Martorell, PhD; Michael Pratt, MD, MPH

Suggested citation for this article: Salvo D, Reis RS, Stein AD, Rivera J, Martorell R, Pratt M. Characteristics of the Built Environment in Relation to Objectively Measured Physical Activity Among Mexican Adults, 2011. Prev Chronic Dis 2014;11:140047. DOI:http://dx.doi.org/10.5888/pcd11.140047External Web Site Icon.
PEER REVIEWED

Abstract

Introduction
The built environment correlates of physical activity are documented in high-income countries but have yet to be studied among Mexican adults. Our objectives were to assess the associations between characteristics of the built environment and physical activity among adults in Cuernavaca, Mexico, and to examine potential moderation by perceived park and neighborhood safety.
Methods
We conducted a population-based study of adults in Cuernavaca, Mexico, in 2011 (N = 677). Participants wore Actigraph GT3X accelerometers for 7 days. We used geographic information systems (GIS) to generate 500-m- and 1-km-buffer–based measures of net residential density, proportion of commercial land use, land-use mix, connectivity, walkability, and number of parks and transit routes. We also obtained data on distance to the nearest park with GIS. Perceived neighborhood and park safety were self-reported. We created quartile-based categories for all built environment characteristics and ran linear regression models to estimate the association between each characteristic and total weekly moderate-to-vigorous physical activity (MVPA) and MVPA within 10-minute bouts.
Results
Walkability was inversely related to total weekly minutes of MVPA (1-km buffer, −46.9 [standard error, 20.0]; P = .03) and weekly minutes of MVPA within bouts (500-m buffer, −31.5 [12.9]; P = .02). The number of transit routes in the 500-m buffer was inversely related to total weekly minutes of MVPA (−23.8 [10.6]; P = .04). Perception of park safety moderated the association between physical activity and having a park intersect the 500-m buffer.
Conclusion
Our findings contrast with those from high-income countries, suggesting that environmental programs and policies to increase physical activity in Mexican cities cannot be adapted from high-income countries without considering the local context.

Acknowledgments

This work was supported by the CDC Foundation, which received an unrestricted training grant from The Coca-Cola Company. We thank Catalina Torres, Hugo Rodríguez, Lilian Perez, Andrea Ramirez, and our field workers for essential logistic support.

Author Information

Corresponding Author: Deborah Salvo, PhD, Nutrition and Health Research Center, National Institute of Public Health of Mexico, Av. Universidad 655, Col. Sta. Maria Ahuacatitlan, Cuernavaca, Morelos, Mexico, CP 62100. Telephone: 408-829-0005. E-mail: deborah.salvo@insp.mx.
Author Affiliations: Rodrigo S. Reis, Pontificia Universidade Catolica do Parana, Curitiba, Brazil, and Federal University of Parana, Curitiba, Brazil; Areyh D. Stein, Reynaldo Martorell, Emory University, Atlanta, Georgia; Juan Rivera, Nutrition and Health Research Center, National Institute of Public Health, Cuernavaca, Mexico; Michael Pratt, Emory University, Atlanta, Georgia, and Centers for Disease Control and Prevention, Atlanta, Georgia. Dr Salvo is also affiliated with the Stanford Prevention Research Center, Stanford University School of Medicine, Stanford, California. At the time of the research, she was a doctoral student at Emory University, Atlanta, Georgia.

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