Clinical Takeaway
A Canadian cohort study tracked adolescents for 15 years to understand how early risk factors like body image concerns and disordered eating behaviors influence mental health, weight-related outcomes, and substance use into early adulthood. The research highlights that psychosocial factors present in adolescence can have lasting effects on multiple health conditions simultaneously. These findings underscore the importance of early identification and intervention for eating and mental health concerns in young people.
#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 study provides critical evidence on how adolescent eating and body image disturbances progress into adulthood, enabling clinicians to identify high-risk trajectories for eating disorders and comorbid mental health conditions. The Canadian cohort data addresses a significant gap in understanding the long-term developmental pathways linking early psychosocial factors to multimorbid conditions, which can inform prevention and intervention strategies in adolescent populations. By tracking substance use alongside eating and weight-related outcomes, this research clarifies the interconnected nature of these conditions and supports more integrated treatment approaches for affected adults.
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 provides valuable longitudinal data linking adolescent psychosocial factors to adult mental health outcomes, the study’s focus on eating disorders, body image, and weight-related trajectories does not appear to directly examine cannabis use patterns or cannabis medicine applications in this population. Any interpretation regarding cannabis and mental health in this cohort would require careful review of the substance use methodology and stratified analyses, as adolescent cannabis exposure itself is a known confounder in longitudinal mental health research that could obscure or confound observed associations between early eating pathology and adult psychiatric outcomes. The 15-year Canadian follow-up design does provide robust demographic and temporal data that could inform how cannabis-using adolescents with eating or body image concerns fare into adulthood, but such subgroup analyses would need adequate statistical power and careful adjustment for concurrent substance use patterns. For clinicians caring for young adults with histories of disordered eating and concurrent cannabis use, this study underscores the importance of comprehensive longitudinal assessment
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