Adaptive vs Monthly Support for Weight-Loss Maintenance: A Randomized Clinical Trial

Area of Science:

• Obesity research
• Behavioral medicine
• Public health

Background:

• Weight regain is a significant challenge following initial weight loss interventions.
• Extended care programs modestly improve long-term weight management.
• Current extended care often involves monthly sessions, with limited impact.

Purpose of the Study:

• To compare adaptive vs. static telephone-based extended care for reducing weight regain.
• To assess the efficacy of an algorithm-triggered adaptive schedule against a fixed monthly schedule.

Main Methods:

• Randomized clinical trial with 255 adults with obesity.
• 16-week initial weight-loss program followed by 20 months of telephone support.
• Intervention groups: adaptive (algorithm-triggered) vs. static (monthly).

Main Results:

• No significant difference in weight regain between adaptive (1.27 kg) and static (1.75 kg) groups.
• Both groups maintained significant weight loss at 24 months.
• Similar proportions maintained ≥5% weight loss (adaptive 59.5%, static 59.8%).

Conclusions:

• Adaptive telephone-based extended care did not offer additional benefits over a static schedule for weight maintenance.
• Future research should focus on refining predictive algorithms for weight regain.
• Investigating implementation and dissemination of telephone-based interventions is warranted.