Clinical Takeaway
The REAL 2.0 study followed Canadian youth for 15 years to examine how adolescent risk factors like body image concerns and disordered eating contribute to mental health and substance use outcomes in early adulthood. This long-term cohort data helps clarify which early psychosocial factors predict later multimorbid conditions, including eating disorders and weight-related problems. Clinicians can use findings from studies like this to identify high-risk adolescents earlier and target preventive interventions before these conditions become entrenched.
#7 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 psychosocial risk factors, particularly disordered eating and body image disturbance, track into adulthood and contribute to multimorbid mental health and substance use outcomes in a Canadian population. Understanding these long-term trajectories is essential for identifying high-risk adolescents who would benefit from early intervention and for developing prevention strategies that address the interconnected pathways between eating disorders, weight concerns, and comorbid psychiatric conditions. The study’s extended follow-up design fills a significant gap in the literature regarding developmental continuities in eating pathology and associated health complications from early adolescence into early adulthood.
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 on how adolescent psychosocial factors predict adult mental health outcomes and substance use trajectories, the study’s primary focus on eating disorders and weight-related concerns means cannabis use was likely captured as a secondary outcome rather than examined mechanistically. The 15-year follow-up period and Canadian population are strengths for understanding real-world developmental patterns, but clinicians should recognize that any associations between disordered eating, body image disturbance, and cannabis use in this cohort reflect correlation in naturalistic settings and may not isolate cannabis’s direct effects on eating behavior or vice versa. Additionally, the study design cannot clarify whether cannabis use represents self-medication for underlying anxiety or depression related to body image, a behavioral risk marker in a subpopulation with multiple vulnerabilities, or an independent factor worsening eating pathology. For practitioners, this research reinforces that adolescents presenting with eating concerns or body dysmorphia warrant comprehensive assessment of mental