Protocol for Partner2Lose: A randomized controlled trial to evaluate partner involvement on long-term weight loss.

Area of Science:

• Behavioral Science
• Obesity Research
• Couple's Therapy

Background:

• Behavioral interventions achieve initial weight reduction but often result in subsequent weight regain.
• Individual-focused weight management overlooks the significant influence of domestic partners on dietary and physical activity behaviors.
• Interdependence theory suggests couples engaging in communal coping for behavior change achieve better long-term results.

Purpose of the Study:

• To develop and evaluate a partner-assisted intervention for promoting long-term weight loss.
• To investigate the role of interdependence constructs and social support in weight management.
• To compare a standard weight management program with a partner-assisted approach.

Main Methods:

• Randomized controlled trial involving cohabitating individuals with overweight/obesity and their partners.
• Intervention group received standard care plus partner participation in sessions and training in couple's cognitive behavioral therapy for communal coping.
• Primary outcome: participant weight loss at 24 months; secondary outcomes: caloric intake, physical activity, partner weight, and caloric intake.

Main Results:

• Data analysis is pending.
• The study is designed to provide insights into effective long-term weight loss strategies.
• Mediation analyses will explore the influence of interdependence and social support.

Conclusions:

• This trial will elucidate effective strategies for sustained weight loss.
• Findings will highlight the significance of interdependence in successful weight management.
• The study contributes to understanding how partner involvement impacts obesity treatment outcomes.