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Do physical activity and sedentary time mediate the association of the perceived environment with BMI? The IPEN adult study

D. Van Dyck, E. Cerin, M. Akram, TL. Conway, D. Macfarlane, R. Davey, OL. Sarmiento, LB. Christiansen, R. Reis, J. Mitas, I. Aguinaga-Ontoso, D. Salvo, JF. Sallis

. 2020 ; 64 (-) : 102366. [pub] 20200622

Language English Country Great Britain

Document type Journal Article, Observational Study, Research Support, N.I.H., Extramural, Research Support, Non-U.S. Gov't

Persistent link   https://www.medvik.cz/link/bmc22004879

Grant support
P30 DK092950 NIDDK NIH HHS - United States
R01 CA127296 NCI NIH HHS - United States
R01 HL067350 NHLBI NIH HHS - United States
75376 Medical Research Council - United Kingdom

The study's main aim was to examine whether adults' accelerometer-based physical activity and sedentary time mediated the associations of neighbourhood physical environmental perceptions with body mass index (BMI) and weight status across 10 high- and middle-income countries. Data from the IPEN Adult study, an observational multi-country study (n = 5712) were used. Results showed that sedentary time was a non-significant or inconsistent mediator in all models. MVPA mediated the associations of street connectivity, land use mix-diversity, infrastructure/safety for walking and aesthetics with BMI in single models. In the multiple model, MVPA only fully mediated the relation between land use mix-diversity and BMI. This finding was replicated in the models with weight status as outcome. MVPA partially mediated associations of composite environmental variables with weight status. So, although MVPA mediated some associations, future comprehensive studies are needed to determine other mechanisms that could explain the relation between the physical environment and weight outcomes. Food intake, food accessibility and the home environment may be important variables to consider. Based on the consistency of results across study sites, global advocacy for policies supporting more walkable neighbourhoods should seek to optimize land-use-mix when designing and re-designing cities or towns.

References provided by Crossref.org

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$a The study's main aim was to examine whether adults' accelerometer-based physical activity and sedentary time mediated the associations of neighbourhood physical environmental perceptions with body mass index (BMI) and weight status across 10 high- and middle-income countries. Data from the IPEN Adult study, an observational multi-country study (n = 5712) were used. Results showed that sedentary time was a non-significant or inconsistent mediator in all models. MVPA mediated the associations of street connectivity, land use mix-diversity, infrastructure/safety for walking and aesthetics with BMI in single models. In the multiple model, MVPA only fully mediated the relation between land use mix-diversity and BMI. This finding was replicated in the models with weight status as outcome. MVPA partially mediated associations of composite environmental variables with weight status. So, although MVPA mediated some associations, future comprehensive studies are needed to determine other mechanisms that could explain the relation between the physical environment and weight outcomes. Food intake, food accessibility and the home environment may be important variables to consider. Based on the consistency of results across study sites, global advocacy for policies supporting more walkable neighbourhoods should seek to optimize land-use-mix when designing and re-designing cities or towns.
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$a Cerin, Ester $u Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia; School of Public Health, The University of Hong Kong, Hong Kong, China; Baker IDI Heart and Diabetes Institute, Melbourne, Australia
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$a Akram, Muhammad $u Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia
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$a Conway, Terry L $u Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
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$a Macfarlane, Duncan $u Centre for Sports and Exercise, The University of Hong Kong, Hong Kong, China
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$a Davey, Rachel $u Centre for Research & Action in Public Health, Health Research Institute, University Canberra, Australia
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$a Sarmiento, Olga L $u School of Medicine, Universidad de los Andes, Bogotá, Colombia
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$a Christiansen, Lars Breum $u Department of Sports Science and Clinical Biomechanics, University of Southern Denmark, Odense, Denmark
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$a Reis, Rodrigo $u Graduate Program in Urban Management, Pontifical Catholic University of Paraná; (PUCPR), Curitiba, Brazil; Prevention Research Center, Brown School, Washington University, Saint Louis, Missouri, USA
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$a Mitas, Josef $u Institute of Active Lifestyle, Faculty of Physical Culture, Palacký University, Olomouc, Czech Republic
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$a Aguinaga-Ontoso, Ines $u Department of Health Sciences, Public University of Navarra, Navarra, Spain; IdiSNA, Navarra Institute for Health Research, Navarra, Spain
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$a Salvo, Deborah $u Prevention Research Center, Brown School, Washington University, Saint Louis, Missouri, USA
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$a Sallis, James F $u Mary MacKillop Institute for Health Research, Australian Catholic University, Melbourne, Australia; Department of Family Medicine and Public Health, University of California San Diego, La Jolla, CA, USA
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