A healthier retail food environment around the home is associated with longer duration of weight-loss maintenance among successful weight-loss maintainers.

Few studies have examined associations between the retail food environment and weight maintenance. This study examined the residential Retail Food Environment Index (RFEI) of weight loss maintainers and associations with weight maintenance duration, perceived effort and difficulty managing weight, and coping and monitoring strategies. Participants were 6947 members of the WW Success Registry (enrolled January 2018-February 2020), a nationwide (United States) convenience sample of individuals who lost weight using Weight Watchers (WW) and maintained a ≥ 9.1 kg weight loss for ≥1 year (Mean 24.7 kg loss for 3.4 years). Home addresses were geo-coded and the RFEI (ratio of unhealthy [fast-food and convenience stores] to healthy [supermarkets, grocery stores, and fruit/vegetable vendors] outlets) was used to classify the healthfulness of the food environments. Validated questionnaires measured psychological coping and self-monitoring. Compared to individuals living in the healthiest food environments (RFEI<1.6), those in the least healthy food environments (RFEI ≥4.0) maintained weight loss for 0.5 years less (3.2 vs 3.7 years; 95% CI between-group difference = 0.20, 0.80), reported statistically higher scores but not clinically relevant differences on perceived effort (4.6 vs. 4.5; 95% between-group difference = 0.01, 0.21) and difficulty managing their weight (3.1 vs. 3.0; 95% CI between-group difference = 0.01, 0.17) and practice of self-monitoring (2.7 vs. 2.6; 95% CI between-group difference = 0.01, 0.14). No differences in psychological coping were observed. Weight loss maintainers living in the least healthy retail food environments maintained weight loss for a shorter duration compared to those in the healthiest food environments.

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Copyright © 2023. Published by Elsevier Inc.

Déclaration de conflit d'intérêts

Declaration of Competing Interest The authors declare the following financial interests/personal relationships which may be considered as potential competing interests: Dr. Cardel and Dr. Foster are employees and stakeholders of WW. Dr. Phelan has a grant from WW and is a paid consultant for Education Initiatives. Dr. Wolfson was supported by the National Institutes of Diabetes and Digestive and Kidney Diseases of the National Institutes of Health (Award #K01DK119166). Dr. Gudzune was supported by the National Institutes of Health (P50MH115842; UH3HL155801). She serves as the medical director for the American Board of Obesity Medicine, has a research grant from Novo Nordisk, and is a paid consultant to Eli Lilly.