Features of the built environment related to physical activity friendliness and children's obesity and other risk factors.

OBJECTIVES: We investigated the relationships among environmental features of physical activity friendliness, socioeconomic indicators, and prevalence of obesity (BMI status), central adiposity (waist circumference, waist-height ratio), and hypertension. DESIGN AND SAMPLE: The design was cross-sectional; the study was correlational. The sample was 911 kindergarteners through sixth graders from three schools in an urban school district residing in 13 designated neighborhoods. MEASURES: Data from walking environmental community audits, census data for socioeconomic indicators, body mass index, waist circumference, waist-height ratio, and blood pressure were analyzed. A modified Alfonzo's Hierarchy of Walking Needs model was the conceptual framework for environmental features (i.e., accessibility, safety, comfort, and pleasurability) related to physical activity.
RESULTS: Accessibility was significantly and negatively correlated with prevalence of obesity and with prevalence of a waist-height ratio >0.50. When neighborhood education was controlled, and when both neighborhood education and poverty were controlled with partial correlational analysis, comfort features of a walking environment were significantly and positively related to prevalence of obesity. When poverty was controlled with partial correlation, accessibility was significantly and negatively correlated with prevalence of waist-height ratio >0.50.
CONCLUSIONS: The built environment merits further research to promote physical activity and stem the obesity epidemic in children. Our approach can be a useful framework for future research.