Clinical Takeaway
The REAL 2.0 study tracked Canadian youth for 15 years to examine how adolescent risk factors like body image concerns and disordered eating contribute to eating disorders, mental health conditions, and substance use problems in early adulthood. The research highlights that psychosocial vulnerabilities identified in early adolescence can predict a range of multimorbid health outcomes later in life. Clinicians should recognize adolescence as a critical window for screening and early intervention across these interconnected health domains.
#6 Research on Eating and Adolescent Lifestyle (REAL) 2.0: 15-year follow-up study of eating disorders and weight-related trajectories, mental health and substance use health from early adolescence to early adulthood-a Canadian cohort profile.
Citation: Obeid Nicole et al.. Research on Eating and Adolescent Lifestyle (REAL) 2.0: 15-year follow-up study of eating disorders and weight-related trajectories, mental health and substance use health from early adolescence to early adulthood-a Canadian cohort profile.. BMJ open. 2026. PMID: 41526025.
Design: 0 Journal: 3 N: 4 Recency: 3 Pop: 3 Human: 1 Risk: -2
This 15-year longitudinal cohort study provides critical evidence on how adolescent body image and disordered eating trajectories predict adult mental health outcomes and comorbid conditions in a Canadian population, addressing a significant gap in understanding multimorbidity pathways from early adolescence through early adulthood. Understanding these etiological connections is essential for identifying high-risk youth who may benefit from early intervention to prevent progression to clinical eating disorders and associated psychiatric and substance use disorders. The long-term prospective design and comprehensive assessment of psychosocial risk and protective factors offer clinically actionable data for developing stratified prevention and treatment strategies in adolescent populations.
Quality Gate Alerts:
- Preclinical only
Methodological Considerations:
- Cross-sectional design — causal inference not possible
Abstract: PURPOSE: Few studies have examined how psychosocial risk and protective factors in adolescence shape mental health outcomes and other multimorbid conditions in adulthood, particularly among Canadian youth. The Research on Eating and Adolescent Lifestyle (REAL) 2.0 study was a 15-year follow-up cohort study designed to investigate how early etiological factors, including body image and disordered eating symptoms in adolescence, contribute to the development of eating, weight-related concerns, mental health and substance use health problems in early adulthood. In this paper, we describe the REAL 2.0 cohort’s demographic and clinical characteristics alongside an overview of the study procedures, laying the groundwork for collaboration on future learnings with this unique data. PARTICIPANTS: The cross-sectional REAL study initially surveyed middle and high school students from 2004 to 2010 (n=3043) across 43 schools in the Ottawa, Canada region. Of those, respondents in grade 7 or 9 (n=1197 from 25 of the 43 original schools) were asked to participate in a longitudinal arm of the study that consisted of yearly follow-ups. From the longitudinal cohort, there were 278 participants (29.1% male; Mage=28.6) from those who consented to be re-contacted (n=912), who completed the REAL 2.0 survey electronically (30.4%), providing comprehensive data on demographic, clinical, eating and weight-related behaviour, psychological, social, environmental and substance use health factors in adulthood. FINDINGS TO DATE: 9.4% of REAL 2.0 participants met DSM-5 criteria for an eating disorder, while 17.6% met criteria for disordered eating. Moderate to severe anxiety was reported by 28% of participants, while 21.6% experienced moderate to severe depressive symptoms. Regarding substance use, 16.9% engaged in hazardous drinking, 16.9% used cannabis daily or almost daily, and 4.3% reported daily tobacco use. FUTURE PLANS: REAL 2.0 has the potential to answer multiple research questions about s
🧠 While the REAL 2.0 cohort study provides valuable longitudinal data on how adolescent eating behaviors and body image track into adulthood, it appears to focus primarily on eating disorders, weight trajectories, and mental health rather than directly examining cannabis use patterns or cannabis-related outcomes in this population. Any interpretation of cannabis use findings from this dataset would need careful attention to potential confounders including concurrent substance use, psychiatric comorbidities, socioeconomic factors, and the timing of cannabis initiation relative to the measured outcomes, all of which could substantially influence observed associations. The 15-year Canadian cohort design is methodologically strong for longitudinal questions, but clinicians should recognize that observational data cannot establish causation and that cannabis use in this youth cohort likely reflects pre-legalization exposure patterns that may not generalize to current medical cannabis discussions. If this study does examine cannabis use as a secondary outcome or confounder, practitioners should consider whether any reported associations with eating disorders or mental health represent true cannabis effects or rather