by Manisha Kashyap, PhD
The Health4Life study, a randomized controlled trial (RCT) following CONSORT guidelines and prospectively registered with the Australian and New Zealand Clinical Trials Registry, has yielded mixed results in adolescent mental health outcomes. Ethically approved by multiple institutions, including the University of Sydney, Curtin University, and the University of Queensland, this comprehensive initiative aimed to address prevalent risk behaviors among adolescents across New South Wales (NSW), Queensland (QLD), and Western Australia (WA). This Is a particularly good time to publicize any advances in mental health as May is Mental Health Awareness Month. The report was published on May 23, 2024 in Nature Mental Health by scientists from the Matilda Centre for Research in Mental Health and Substance Use, The University of Sydney, Sydney, NSW, Australia.
In their abstract, the authors noted that the Health4Life-school-based multiple health behavior change (MHBC) intervention targets six lifestyle risk factors (the “Big 6” of diet, sleep, physical activity, screentime, alcohol use, and smoking. This study presents intervention effects on secondary outcomes of depressive, anxiety, and psychological distress symptoms. Generalized linear mixed-effect analyses of data from baseline, post-intervention (7 weeks), (12 months), and (24 months) showed that the Health4Life intervention was no more effective than an active control in reducing depressive, anxiety or psychological distress symptoms at a 24- or 12-month follow-up; however, there were short-term benefits for psychological distress and depressive symptoms immediately post-intervention. This study offers new evidence that multiple health behavior change interventions may improve adolescent mental health, but future research should explore methods to address anxiety and sustain effects over the longer term.
Despite challenges in achieving the initially targeted sample size of 72 schools, the study enrolled 6,639 students from 71 schools. Rigorous methodology, incorporating power analyses and randomization stratified by school region and gender composition, ensured robust data collection and analysis. Additionally, post-hoc power analyses confirmed the study’s capacity to detect significant effects on targeted mental health outcomes.
The Health4Life intervention implemented a staged prevention approach, beginning with a universal program delivered during the first year of secondary school in Australia (year 7 of health education). According to the authors, “universal program” refers to prevention interventions aimed at a broad population of adolescents, regardless of their current mental health status or risk level. Specifically, these interventions are designed to be implemented in school settings where they can reach nearly all young people within the targeted age range. The goal is to prevent mental disorders by addressing general lifestyle behaviors that are associated with mental health, rather than focusing on treating existing mental health issues or targeting high-risk groups only.
Given that 98% of young people aged 6–14 in OECD countries are enrolled in schooling, universal prevention interventions targeting mental disorders commonly occur in school settings. Interventions typically employ psychological and psychosocial approaches such as cognitive behavioral therapy, mindfulness, emotion regulation, or a combination of these. School has generally been shown to be a suitable intervention setting due to the substantial portion of waking time young people spend at school, the increasing focus on student well-being, and established referral pathways for students who need additional support. However, school-based universal intervention effects on depressive symptoms, anxiety symptoms, and other mental health outcomes have thus far been small and transient, not typically lasting beyond first follow-up, with some even resulting in iatrogenic effects.
Based on real-life stories and co-designed with adolescents, the Health4Life intervention comprised cartoon-led lessons, teacher-facilitated activities, and a behavior-tracking app. Tailored feedback mechanisms provided personalized insights and goals. For students identified as “at risk,” selective booster content, informed by cognitive behavioral therapy and motivation enhancement techniques, was made available through the behavior-tracking app.
In contrast, the control group received standard health education lessons consistent with state syllabi. At the time of trial delivery, the health education syllabus varied by state but included content on some or all of the Big 6 and wellbeing. Teachers’ logbooks documented the extent of education on targeted risk behaviors.
Measurement of mental health outcomes utilized validated scales, including the Patient Health Questionnaire for Adolescents (PHQ-A), Kessler 6-item scale, and PROMIS Anxiety Pediatric scale. Additionally, sociodemographic factors such as gender identity, relative family affluence, and cultural and linguistic diversity were considered in the analysis.
Statistical analyses employed mixed-effects regression models to assess intervention effects while adjusting for covariates and potential confounders. Model fit comparisons guided the selection of appropriate regression methods, ensuring robust estimation of intervention effects across time points.
The Health4Life intervention doesn’t wield a magic wand to banish mental health woes as it did not yield sustained effects on anxiety, depression, or distress over the 12-month and 24-month follow-up period.
However, it does wield something equally potent: Transient outcomes, particularly in alleviating psychological distress and depressive symptoms immediately post-intervention as compared to the active control.
When compared with other school-based mental health prevention interventions—which generally use more traditional psychological approaches—the Health4Life intervention is unique as it targets lifestyle risk factors known to interact with mental health. This study offers new evidence that MHBC interventions may offer an indirect method to target mental health improvements among adolescents; however, further research is needed to understand how to sustain effects over the long-term.
The findings and results of the Health4Life study indicate how interventions implemented within schools can marginally enhance mental health outcomes among adolescents. This hints at the role educational institutions can play in promoting the well-being of young people. Such interventions could include programs targeting stress management, coping strategies, mental health awareness, and access to counseling services, all within the school environment. The implication is that investing in mental health initiatives within schools can yield tangible benefits for adolescent mental well-being.
This research from the Health4Life study was published May 23, 2024 in Nature Mental Health and the open-access article is titled “Anxiety, Depression and Distress Outcomes from the Health4Life Intervention for Adolescent Mental Health: A Cluster-Randomized Controlled Trial
[Nature Mental Health article]
About the Commentary Writer
Dr. Manisha Kashyap (Dr. MK)
BDS (Hons), MSc (Clinical Research), PhD (Healthcare)
Manisha Kashyap earned a BS in Dentistry (Gold Medalist) and an MS in Clinical Research, and she is a driven PhD scholar in Health Policy and Management.
With a rich background as a Drug Safety Analyst for top-tier bio pharmaceutical companies, she blends clinical expertise with a passion for advancing healthcare accessibility and innovation through her writing career for the love of science and technology via MedKnow Research Writing Solutions.
Dr. Kashyap’s PhD thesis is on “Artificial Intelligence (AI) and Public Health: Harnessing the Power of AI for Enhanced Public Health Policy and Management.”