Linking childhood obesity to the built environment: a multi-level analysis of home and school neighbourhood factors associated with body mass index.

Objectives: This study examines environmental factors associated with BMI (body mass index) levels among adolescents with the aim of identifying potential interventions for reducing childhood obesity.

Methods: Students (n=1,048) aged 10-14 years at 28 schools in London, ON, completed a survey providing information on age, sex, height, weight, home address, etc., which was used to construct age-sex adjusted BMI z-scores.