Researcher

Title

• Clinical Assistant Professor, Department of Pediatrics, Université de Montréal Medical School (August 2019-)
• Pediatrician, Division of Adolescent Medicine, CHU Sainte-Justine (August 2019-)
• Pediatric Addiction Medicine Fellow, Boston Children’s Hospital, Harvard Medical School (2017-2019)

• Master of Public Health, Clinical Effectiveness, Harvard School of Public Health (2019)
• Pediatric Addiction Medicine Fellowship, Boston Children’s Hospital, Harvard medical School (2017-2019)
• Fellowship in Global Journalism, Munk School of Global Affairs, University of Toronto (2016-2017)
• Adolescent Medicine Subspecialty training, Hospital for Sick Children, University of Toronto (2015-2017)
• Residency training, general pediatrics, CHU Sainte-Justine, Université de Montréal (2012-2015)
• Undergraduate medical degree, McGill University (2012)

Dr. Chadi’s research focuses on the prevention and treatment of adolescent substance use and related disorders, and specifically on problems related to tobacco, e-cigarette and cannabis use. His work also seeks to improve the understanding of the impacts of public policies, risk perceptions and personal beliefs on use of alcohol and drugs among adolescents. Dr. Chadi has studied the use of interventions delivered either in person or through technology for the improvement of health and quality of life for adolescents with mental health problems including depression, anxiety and eating disorders.

• Adolescent risky behaviors
• Gender diversity
• Substance use disorders
• Eating disorders in adolescents
• Adolescent mental health
• Mindfulness-based interventions
• Qualitative and quantitative research
• Public health

Career Summary

Dr. Chadi is a pediatrician and clinician-scientist specialized in adolescent and addiction medicine. He is currently an Assistant Clinical Professor at Université de Montréal and a Junior 1 Clinical Research Scholar with the Fonds de recherche du Québec – Santé. In 2019, he became the first pediatrician in North America to complete a fellowship in pediatric addiction medicine.

As the director of the substance use clinic and co-director and co-founder of the gender diversity Clinique at CHU Sainte-Justine, his clinical activities focus on the prevention and treatment of mental health disorders, including eating disorders and substance use disorders during adolescence as well as on treatment of transgender and non-binary youth.

Dr. Chadi is the author of more than 100 peer-reviewed publications including several position statements on tobacco and vaping for the Canadian Paediatric Society and the Society for Adolescent Health and Medicine. A passionate advocate for the improvement of child and adolescent health, he often appears in regional and national media. 

Laboratory

The CHAD Lab
(Child and Adolescent Development Lab)

Awards and Distinctions

• 2020, Best workshop award, AMERSA Annual meeting
• 2020, DuRant award for statistical rigour, SAHM Annual Meeting
• 2022, Victor-Marchessault Advocacy Award, Canadian Paediatric Society
• 2017-2019, Research in Addiction Medicine Scholar Program, National Institute for Drug Abuse
• 2018, Honorable Mention, Best Presentation, American Society of Addiction Medicine
• 2017, Ruth Fox Scholar, American Society of Addiction Medicine
• 2012, Provincial Leadership Award, Canadian Medical Association
• 2012, Lieutenant-Governor of Quebec Award, McGill University
• 2007-201, Millenium Scholarship Award

Presentations

• N Chadi, J Kelley, V Taillefer, S Marsolais, L Chiniara. Clinical and demographic characteristics of a cohort of children and adolescents followed at an interdisciplinary gender diversity clinic, World Professional Association for Transgender Health meeting 2022, Montréal, QC, 2022 (platform presentation)
• F Vergunst, H Barry, K Minor, N Chadi. Climate Change and Harmful Substance Use – A Risk Pathway Framework, 84th CPDD Annual meeting, Minneapolis, ND, 2022 (poster presentation)
• V Taillefer, J Kelley, S Marsolais, L Chiniara, N Chadi. Clinical and demographic characteristics of a cohort of children and adolescents followed at an interdisciplinary gender diversity clinic for French-speaking youth, Canadian Paediatric Society Annual Meeting, Montreal QC, 2022 (poster presentation)
• N Chadi. COVID-19 and Adolescent Mental Health: Responding to the “hidden epidemic”, platform presentation (selected abstract), Society for Adolescent Health and Medicine Annual Meeting, Chicago IL, 2021 (selected abstract)
• N Chadi, F Vergunst , M Orri, C Brousseau-Paradis, N Castellanos-Ryan, JR Séguin, DS Nagin, F Vitaro, RE Tremblay, SM Côté. Long-term Social and Economic Outcomes of Adolescent Poly-substance Use among Canadian Boys from Low-income Backgrounds, AMERSA annual meeting, Washington, DC, 2020 (selected abstract)

Publications

PubMed

J Kelley, A Pullen Sansfaçon, MA Gelly, L Chiniara, N Chadi (2022). School Factors Strongly Impact Transgender and Non-Binary Youths' Well-Being. Children (Basel). 2022 Oct 4;9(10):1520. doi: 10.3390/children9101520. PMID: 36291456; PMCID: PMC9599998.
G Beaudry, O Drouin, J Gravel, A Smyrnova, A Bender, M Orri, MC Geoffroy, N Chadi (2022). A comparative analysis of pediatric mental health-related emergency department utilization in Montréal, Canada, before and during the COVID-19 pandemic. Ann Gen Psychiatry. 2022 Jun 13;21(1):17. doi: 10.1186/s12991-022-00398-y. PMID: 35698227; PMCID: PMC9191527.
S Zutrauen, MT Do, L Ghandour, C Moore-Hepburn, S Beno, SA Richmond, N Chadi (2021). Acute injury or illness related to the inhalation of vaping aerosols among children and adolescents across Canada: A cross-sectional survey of Canadian paediatricians. Paediatr Child Health. 2021 Aug 23;27(1):43-49.
N Chadi, C Spinoso-Di Piano, E Osmanlliu, J Gravel, O Drouin (2021). Mental Health-Related Emergency Department Visits in Adolescents Before and During the COVID-19 Pandemic: A Multicentric Retrospective Study. J Adolesc Health. 2021 Nov;69(5):847-850.
N Chadi, MN Ahun, C Laporte, M Boivin, RE Tremblay, SM Côté, M Orri (2021). Pre- and postnatal maternal smoking and offspring smoking trajectories: Evidence from a 20-year birth cohort. Prev Med. 2021 Jun;147:106499.
N Chadi, E Vyver, RE Bélanger (2021). Protecting children and adolescents against the risks of vaping. Paediatr Child Health. 2021 Sep 17;26(6):358-374.
N Chadi, S Levy, LE Wisk, ER Weitzman (2020). Student Experience of School Screening, Brief Intervention, and Referral to Treatment. J Sch Health. 2020 Jun;90(6):431-438.
N Chadi, S Levy, ER Weitzman (2020). Moving beyond perceived riskiness: Marijuana-related beliefs and marijuana use in adolescents. Subst Abus. 2020;41(3):297-300.
N Chadi, R Schroeder, JW Jensen, S Levy (2019). Association Between Electronic Cigarette Use and Marijuana Use Among Adolescents and Young Adults: A Systematic Review and Meta-analysis. JAMA Pediatr. 2019 Oct 1;173(10):e192574.
N Chadi, J Rodean, JJ Earlywine, BT Zima, SM Bagley, S Levy, SE Hadland (2019). Treatment for Nicotine Use Disorder Among Medicaid-Enrolled Adolescents and Young Adults. JAMA Pediatr. 2019 Nov 1;173(11):1103-1105.