Clinical Takeaway
A 15-year Canadian cohort study tracked adolescents into early adulthood to examine how early risk factors like body image concerns and disordered eating predict later outcomes including mental health conditions and substance use. The findings reinforce that eating and weight-related concerns in adolescence do not occur in isolation but are closely linked to broader patterns of mental health and substance use in adulthood. Clinicians should screen young patients for disordered eating and body image distress as early warning signs of multimorbid health risks that may persist well into adulthood.
#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 risk factors such as body image disturbance and disordered eating predict trajectories of eating disorders, weight-related pathology, and comorbid mental health and substance use conditions into early adulthood. Understanding these developmental pathways in a Canadian population enables clinicians to identify high-risk adolescents who require early intervention and informs the design of preventive strategies targeting modifiable psychosocial factors during the critical adolescent period. The multimorbidity focus bridges traditionally siloed clinical domains and clarifies the interconnected nature of eating disorders with mental health and substance use, which has direct implications for integrated assessment and treatment planning in clinical practice
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 psychosocial factors predict adult mental health and substance use outcomes, the abstract provided does not contain specific findings regarding cannabis use patterns or cannabis medicine applications, making it difficult to draw clinical conclusions for cannabis practitioners at this time. The study’s strength lies in its 15-year follow-up design and Canadian population focus, yet any analysis of cannabis use trajectories would need to account for significant confounders including concurrent mental health diagnoses, alcohol and other substance use, socioeconomic factors, and the timing of cannabis initiation relative to the developmental window studied. From a clinical perspective, this cohort framework is useful for understanding that adolescent eating disorders and body image disturbance may represent important risk markers for later substance use concerns including cannabis, suggesting that comprehensive assessment of disordered eating and psychiatric history should inform our risk stratification when counseling young adult patients about cannabis use. Practitioners should remain cautious about attributing causality between early psychological