Abstract
Geographic methods have provided insight about food location availability and accessibility in understanding neighbourhood variations in health. However, quantifying exposure to food locations within a pre-defined range of an individual's residence ignores locations outside of the residential neighbourhood encountered in daily life. Global positioning system (GPS) data enables exploration of multiple contextual influences on health. This study defines place in relation to behaviour, employing GPS data to 1) describe adolescent food environments within and outside of the residential buffer, 2) quantify actual food location visits, and 3) explore associations between availability and accessibility of food locations and dietary intake. Adolescents (N=380; ages 12-16), wore GPS loggers for up to seven days. Availability and accessibility of food locations were defined by counts and distances to food locations within a 15-min walk (1km) of home, as well as within 50m of an adolescent's GPS track. We compared the proportion of food locations within the residential buffer to the proportion outside but within the GPS buffer. These proportions were compared to counts and distances to food locations actually visited. We explored associations between food location availability and accessibility with dietary intake variables. Food location availability and accessibility was greater and visits occurred more commonly outside of the residential buffer than within it. Food location availability and accessibility was greater for urban than suburban and rural adolescents. There were no associations between home-based measures of availability and accessibility and dietary intake and only one for GPS-based measures, with greater distance to convenience stores associated with greater fruit and vegetable consumption. This study provides important descriptive information about adolescent exposure to food locations. Findings confirm that traditional home-based approaches overestimate the importance of the neighbourhood food environment, but provide only modest evidence of linkages between the food environment beyond the residential neighbourhood boundary and dietary intake.
| Original language | English |
|---|---|
| Pages (from-to) | 322-330 |
| Number of pages | 9 |
| Journal | Social Science and Medicine |
| Volume | 133 |
| DOIs | |
| Publication status | Published - May 1 2015 |
Bibliographical note
Funding Information:This research was supported by the Canadian Institutes of Health Research's Institute of Human Development, Child and Youth Health and Institute of Nutrition, Metabolism and Diabetes ; and the Heart and Stroke Foundation of Canada , through the Built Environment, Obesity and Health Initiative. The authors thank the ENACT team, including its principal investigators Renee Lyons and Jill Grant; co-investigators (not listed as co-authors) Michael Arthur, Andrea Chircop, Patricia Manuel and Louise Parker; community and policy partners Janet Barlow, Diana Dibblee, Amy MacDonald, Roxane MacInnis, Michelle Murton, Clare O'Connor, Paul Shakotko and Jacqueline Spiers; and staff and students Meredith Flannery, Andrew Harding, Nicole Landry, Kathryn MacKay, Gillian McGinnis, Julie Rouette and Stephanie Wood.
Publisher Copyright:
© 2014 Elsevier Ltd.
ASJC Scopus Subject Areas
- Health(social science)
- History and Philosophy of Science