Intervention to reduce recreational screen-time in adolescents: Outcomes and mediators from the ‘Switch-Off 4 Healthy Minds’ (S4HM) cluster randomized controlled trial

The primary objective was to evaluate the impact of the ‘Switch-off 4 Healthy Minds’ (S4HM) intervention on recreational screen-time in adolescents. Cluster randomized controlled trial with study measures at baseline and 6-months (post-intervention). Eligible participants reported exceeding recreati...

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Bibliographic Details
Published in:Preventive medicine 2016-10, Vol.91, p.50-57
Main Authors: Babic, Mark J., Smith, Jordan J., Morgan, Philip J., Lonsdale, Chris, Plotnikoff, Ronald C., Eather, Narelle, Skinner, Geoff, Baker, Amanda L., Pollock, Emma, Lubans, David R.
Format: Article
Language:English
Subjects:
Adolescent
Australia
Child
Child Welfare
Exercise - physiology
Health Behavior
Health Promotion - methods
Humans
Physical activity
School
Screen
Sedentary behavior
Sedentary Lifestyle
Stress, Psychological - psychology
Time Factors
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Summary:The primary objective was to evaluate the impact of the ‘Switch-off 4 Healthy Minds’ (S4HM) intervention on recreational screen-time in adolescents. Cluster randomized controlled trial with study measures at baseline and 6-months (post-intervention). Eligible participants reported exceeding recreational screen-time recommendations (i.e., >2h/day). In total, 322 adolescents (mean age=14.4±0.6years) from eight secondary schools in New South Wales, Australia were recruited. The S4HM intervention was guided by Self-Determination Theory and included: an interactive seminar, eHealth messaging, a behavioral contract and parental newsletters. The primary outcome was recreational screen-time. Secondary outcomes included mental health (i.e., well-being, psychological distress, self-perceptions), objectively measured physical activity, and body mass index (BMI). Outcome analyses were conducted using linear mixed models and mediation was examined using a product-of-coefficients test. At post-intervention, significant reductions in screen-time were observed in both groups, with a greater reduction observed in the intervention group (−50min/day versus −29min, p
ISSN:0091-7435
1096-0260
DOI:10.1016/j.ypmed.2016.07.014