2500 - OPTIMISING A DIGITAL INTERVENTION FOR PARENTS, TARGETING THE 'BIG 6' ADOLESCENT HEALTH RISK BEHAVIOURS: RESULTS OF MULTIPHASE OPTIMISATION STRATEGY TRIAL

Session: D08S0014 - Digital Media, Technology & Health 4
AUTHORS:
Davidson Lily (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Hunter Emily (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Lubans David (Centre for Active Living and Learning, University of Newcastle ~ Callaghan ~ Australia) , Newton Nicola (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Osman Bridie (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Haidinger Alex (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Finn Tara (Centre for Active Living and Learning, University of Newcastle ~ Callaghan ~ Australia) , Gardner Lauren (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Sunderland Matthew (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Thornton Louise (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Slade Timothy (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Chapman Cath (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Baur Louise (Sydney Medical School, University of Sydney ~ Sydney ~ Australia) , Mihalopoulos Cathérine (School of Public Health and Preventive Medicine, Monash University ~ Melbourne ~ Australia) , Spring Bonnie (Department of Behavioral Sciences and Social Medicine, Florida State University College of Medicine ~ Tallahassee ~ United States of America) , Burrows Tracy (School of Health Sciences, University of Newcastle ~ Callaghan ~ Australia) , Partridge Stephanie (Susan Wakil School of Nursing, University of Sydney ~ Sydney ~ Australia) , Parmenter Belinda (School of Health, University of the Sunshine Coast ~ Sippy Downs ~ Australia) , Teesson Maree (The Matilda Centre for Research in Mental Health and Substance Use, University of Sydney ~ Sydney ~ Australia) , Champion Katrina (The School of Public Health, University of Sydney ~ Sydney ~ Australia)
Abstract text:
Introduction: Chronic health conditions and common mental disorders can be prevented by improving six health risk behaviours among adolescents (the 'Big 6'): physical inactivity, poor nutrition and sleep, sedentary screen use, and using alcohol and cigarettes/vapes. The 'Big 6' are particularly prevalent among adolescents experiencing socio-economic disadvantage. While parent-focussed interventions can be effective for improving health risk behaviours among adolescents, few parent-focussed interventions target multiple health risk behaviours concurrently, and even fewer are specific to families experiencing socio-economic disadvantage.


Purpose: This presentation reports findings from the 'Optimisation Phase' of a Multiphase Optimisation Strategy (MOST) trial, which tested five components of a parent-focused digital intervention to determine which elements, individually and in combination, most effectively enhanced parents' encouragement of adolescents' healthy behaviours across the 'Big 6'.


Method: A 2x4 factorial design is being implemented among parents (N=303) experiencing socio-economic disadvantage in Australia. Parents were randomised to one of 16 intervention combinations. All receive six interactive online modules (one per week, for each of the 'Big 6'). Parents are randomised to receive 1 of 16 combinations of additional components: text messages, telehealth coaching, personalised feedback, and stress management training. Parents complete surveys at baseline and 3-months post-baseline. The primary outcome is change in parental encouragement of adolescent health behaviours at 3-months.


Results: Recruitment is complete (N=303 parents) and 3-month follow-up survey completion rate is currently 75% (N=120 of 161 due). We anticipate follow-up data collection will be complete by January 2026, and analyses complete by February 2026. Results will guide assembly of an 'optimised intervention package' that achieves greatest improvement in parental encouragement of adolescent health behaviours, with the least possible resource burden.


Conclusions: This is the first study to use the MOST framework to co-design a digital parenting intervention targeting multiple health risk behaviours for chronic disease and comorbid mental disorders.