Abstract
This study investigated associations between change in the food environment and change in measured body mass index (BMI) and waist circumference (WC) in the Christchurch Health and Development Study (CHDS) birth cohort. Our findings suggest that cohort members who experienced the greatest proportional change towards better access to fast food outlets had the slightly larger increases in BMI and WC. Contrastingly, cohort members who experienced the greatest proportional change towards shorter distance and better access to supermarkets had slightly smaller increases in BMI and WC. Our findings may help explain the changes in BMI and WC at a population level.
• Access to food is increasingly deemed an important factor for population-level adiposity.
• We use a birth cohort study from New Zealand with measured adiposity outcomes.
• Cohort members were linked to how their food environment changed.
• Changing food access may help explain the changes in BMI and WC at a population level.