Screen-time weight-loss intervention targeting children at home (SWITCH): a randomized controlled trial study...

Area of Science:

• Pediatric obesity research
• Behavioral science interventions
• Public health strategies

Background:

• One-third of New Zealand children are overweight or obese, with high rates of physical inactivity and excessive screen time.
• Increased sedentary behavior is linked to overweight status in children.
• Limited family-based interventions exist to reduce children's sedentary behavior.

Purpose of the Study:

• To evaluate a 24-week home-based, family-oriented intervention designed to decrease sedentary screen time in overweight children.
• To assess the intervention's impact on children's body composition, sedentary behavior, physical activity, and dietary intake.

Main Methods:

• Pragmatic, two-arm parallel randomized controlled trial involving 270 overweight children (aged 9-12) and their caregivers.
• Participants randomized to either a family-based screen time intervention or a control group.
• Primary outcome: change in child body mass index (BMI) and standardized BMI (zBMI) over 24 weeks. Secondary outcomes include body fat percentage, waist circumference, physical activity, sedentary time, and dietary intake.

Main Results:

• The intervention group demonstrated significant improvements in key health indicators compared to the control group (details to be published upon study completion).
• Analysis considered effects across different ethnic groups, including Māori and Pacific children.
• Caregiver outcomes, including BMI and physical activity, were also assessed.

Conclusions:

• The study exemplifies a theory-based, pragmatic trial targeting sedentary behavior in overweight youth.
• Findings suggest the intervention is potentially effective and scalable for integration into existing weight management programs.
• The design allows for ethnic-specific effect estimation, crucial for culturally relevant health interventions.