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Does Physical Activity Mediate the Association Between Perceived Neighborhood Aesthetics and Overweight/Obesity Among South African Adults Living in Selected Urban and Rural Communities?

BACKGROUND: To investigate the mediation effects of physical activity (PA) on the relationship between the perceived neighborhood aesthetic environment and overweight/obesity in free-living South Africans.

METHODS: A cross-sectional study of 671 adults aged ≥ 35 years was analyzed. PA was assessed using the validated International Physical Activity Questionnaire. Perceived neighborhood aesthetics was assessed using the Neighborhood Environment Walkability Scale Questionnaire.

RESULTS: Of 671 participants, 76.0% were women, 34.1% aged 45-54 years, and 69.2% were overweight or obese. In adjusted logistic regression models, overweight/obesity was significantly associated with neighborhood aesthetics [odds ratio (OR) = 0.68; 95% confidence interval (CI), 0.50-0.93] and PA (OR = 0.65; 95% CI, 0.65-0.90). In expanded multivariable models, overweight/obesity was associated with age 45-55 years (OR = 1.59; 95% CI, 1.05-2.40), female gender (OR = 6.24; 95% CI, 3.95-9.86), tertiary education (OR = 4.05; 95% CI, 1.19-13.86), and urban residence (OR = 2.46; 95% CI, 1.66-3.65).

CONCLUSION: Aesthetics was positively associated with PA; both aesthetics and PA were negatively associated with overweight and obesity. There was no evidence to support a significant mediating effect of PA on the relationship between aesthetics and overweight/obesity. Future studies should consider objective assessment of aesthetics and PA. In addition, future studies should consider using longitudinal design to evaluate food-related environments, which are related to overweight or obesity.

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