Long-Term Weight Loss Effects of a Behavioral Weight Management Program: Does the Community Food Environment Matter?

Area of Science:

• Public Health
• Behavioral Science
• Obesity Research

Background:

• Nationwide behavioral weight management programs aim to improve long-term health outcomes.
• Community food environments, characterized by access to food retailers, may influence program adherence and effectiveness.
• Understanding the interplay between environment and behavior is crucial for sustainable weight management.

Purpose of the Study:

• To investigate if community food environments modify the sustained effects of a national weight management program on body mass index (BMI).
• To analyze the impact of food retailer density (supermarkets, convenience stores, fast food restaurants) on weight management outcomes over time.

Main Methods:

• Utilized a large sample of male and female participants and controls from a nationwide weight management program.
• Employed difference-in-difference regression models with fixed effects to assess program impacts.
• Quantified community food environment by counting food retailers within a 1-mile radius of participants' residences.

Main Results:

• For men, body mass index (BMI) showed an incremental increase at 12, 18, and 24 months post-program, despite an initial decrease.
• Women also experienced a decrease in program effectiveness over time, with a significant incremental BMI change at 12 months.
• Little evidence suggested that community food environments significantly altered these longer-term weight management effects.

Conclusions:

• The long-term effectiveness of behavioral weight management programs on BMI may not be substantially influenced by the surrounding community food environment.
• Physiological adaptations could potentially override environmental influences on adherence, impacting sustained weight loss.
• Further research is needed to explore the complex interactions between individual physiology, behavior, and environment in obesity management.