Dalla Lana School of Public Health

Faculty Member

Hayley Hamilton PhD

Research Interests

• Adolescent mental health and substance use
• Immigrant health
• Social determinants of health
• Population health surveys

Other Affiliations

Senior Scientist, Centre for Addiction and Mental Health

Current Research Projects

Ontario Student Drug Use and Health Survey. Funding through various contracts; Ongoing.  Principal Investigator.

CAMH Monitor Survey. Funding through various contracts; Ongoing. Principal Investigator

Alcohol policy liberalization and youth alcohol use and harms in Ontario. CIHR 2025-27. Co-Principal Investigator.

Trends in gambling, and gaming among students from 2017 to 2023: a secondary analysis. CIHR 2024-26. Co-Principal Investigator

Mental health standards in youth justice settings. CIHR 2023-25. Co-Principal Investigator

Select Publications

Nigatu, Y., Elton-Marshall, T., Wickens, C., & Hamilton, H.A. (2024). The association of frequency of worry about financial debt with substance use among adults in Ontario, Canada. Substance Use and Misuse, 59(8), 1190-1199.

Sampasa-Kanyinga, H., Chaput, J-P, Mougharbel, F., & Hamilton, H.A. (2024). Associations between cannabis use, opioid misuse and severe psychological distress in adolescents: A cross-sectional school-based study. Drug and Alcohol Dependence, 255, 111085. DOI: 10.1016/j.drugalcdep.2024.111085.

Nigatu, Y.T., Imtiaz, S., Elton-Marshall, T., Rueda, S., Hamilton, H.A. (2024). Changes in modes of cannabis consumption pre- and post-legalization and their correlates among adults in Ontario, Canada: 2017-2022. American Journal of Drug and Alcohol Abuse, 50(4), 557-565. doi: 10.1080/00952990.2024.2369905.

Imtiaz, S., Nigatu, Y.T., Ali, F., Elton-Marshall, T., Rehm, J., Rueda, S., Hamilton, H.A. (2024). Changes in medical cannabis use in Ontario, Canada (2014 to 2019): Trajectory of trends, medical authorization patterns and association with recreational cannabis legalization. Preventive Medicine Reports, 44, 102805.

Halladay, J., Sunderland, M., Chapman, C., Repchuck, R., Georgiades, K., Boak, A., Hamilton, H.A. & Slade, T. (2024). Examining temporal trends in psychological distress and the co-occurrence of common substance use in a population-based sample of grades 7-12 students from 2013-2019. Social Psychiatry and Psychiatric Epidemiology, 59(8), 1367-1377.

Nigatu, Y.T., Elton-Marshall, T., Mann, R.E., & Hamilton, H.A. (2022). Associations of cannabis use, opioid use, and their combination with serious psychological distress among Ontario adults. Stress & Health, 38, 38-46. https://doi.org/10.1002/smi.3071.

Elton-Marshall, T., Wells, S., Jankowicz, D., Nigatu, Y.T., Wickens, C.M., Rehm, J. & Hamilton, H.A. (2021). Multiple COVID-19 risk factors increase the likelihood of experiencing anxiety symptoms in Canada. Canadian Journal of Psychiatry, 66, 56-58. doi: 10.1177/0706743720949356.

Wardell, J. D., Rueda, S., Elton-Marshall, T., Mann, R. E., & Hamilton, H.A. (2021). Prevalence and correlates of medicinal cannabis use among adolescents. Journal of Adolescent Health, 68, 103-109. https://doi.org/10.1016/j.jadohealth.2020.07.032.

Cook, S., Hamilton, H.A., Montazer, S., Sloan, L., Wickens, C.M., Cheung, A., Boak, A., Turner, N.E., & Mann, R.E.  (2021). Increases in serious psychological distress among Ontario students between 2013 and 2017: Assessing the impact of time spent on social media. Canadian Journal of Psychiatry, 66, 747-756. https://doi.org/10.1177/0706743720987902.

Vingilis, E., Stewart, S., Hamilton, H.A., Seeley, J., Einarson, K., Kolla, N., Bondy, S.J., & Erickson, P. (2020). Pilot study of mental health and substance use of detained youths in Ontario, Canada. Children and Youth Services Review, 116, 105156. DOI: 10.1016/j.childyouth.2020.105156.

Kolar, K., Elton-Marshall, T., Mann, R.E., & Hamilton, H.A. (2020). Routes of cannabis administration among Ontario adolescents during criminal prohibition of cannabis in Canada.  Drugs:  Education, Prevention and Policy, 27, 421-426.

Stewart, S.L., Thornley, E., Lapshina, N., Erickson, P., Vingilis, E., Hamilton, H.A., Kolla, N. (2020). Sex differences in youth with mental health problems in inpatient, outpatient and youth justice settings. BMC Psychiatry, 20(1): 11. doi: 10.1186/s12888-019-2413-z.

Sampasa-Kanyinga, H., Chaput, J.-P., & Hamilton, H.A. (2019). Social media use, school connectedness, and academic performance among adolescents. The Journal of Primary Prevention, 40(2), 189-211. doi:10.1007/s10935-019-00543-6.

Hamilton, H.A., Wickens, C.M., Ialomiteanu, A., & Mann, R.E. (2019). Debt stress, psychological distress and overall health among adults in Ontario. Journal of Psychiatric Research, 111, 89-95. DOI: 10.1016/j.jpsychires.2019.01.008.

Hamilton, H.A., Owusu-Bempah, A., Boak, A., & Mann, R.E. (2018). Ethnoracial differences in cannabis use among native-born and foreign-born high school students in Ontario. Journal of Ethnicity in Substance Abuse, 17(2), 123-134.  DOI: 10.1080/15332640.2017.1312655.

Hamilton, H. A., Brands, B., Ialomiteanu, A., & Mann, R. E. (2017). Therapeutic use of cannabis: Prevalence and characteristics among adults in Ontario, Canada. Canadian Journal of Public Health, 108, e282-e287.

Sampasa-Kanyinga, H. & Hamilton, H. A. (2016). Does socioeconomic status moderate the relationships between school connectedness and psychological distress, suicidal ideation and attempts in adolescents? Preventive Medicine, 87(June), 11-17.

Sampasa-Kanyinga, H. & Hamilton, H.A. (2015). Social networking sites and mental health problems in adolescents: The mediating role of cyberbullying victimization. European Psychiatry, 30, 1921-1027. DOI: 10.1016/j.eurpsy.2015.09.011.

Sampasa-Kanyinga, H., Chaput, J. & Hamilton, H.A.  (2015). Associations between the use of social networking sites and unhealthy eating behaviour and excess body weight in adolescents.  British Journal of Nutrition, 114(11), 1941-1947. DOI: 10.1017/S0007114515003566.

Hamilton, H.A., Ferrence, R., Boak, A., Schwartz, R., Mann, R. E., O’Connor, S., & Adlaf, E. M. (2015). Ever use of nicotine and non-nicotine electronic cigarettes among high school students in Ontario, Canada. Nicotine & Tobacco Research, 17(10), 1212-1218.  DOI: 10.1093/ntr/ntu234.

Hamilton, H. A., Ferrence, R., Boak, A., Schwartz, R., Mann, R. E., O’Connor, S., & Adlaf, E. M. (2014). Ever use of nicotine and non-nicotine electronic cigarettes among high school students in Ontario, Canada. Nicotine & Tobacco Research.  DOI: 10.1093/ntr/ntu234.

Hamilton, H. A., van der Maas, M.*, Boak, A., & Mann, R. E. (2014). Subjective social status, immigrant generation, and cannabis and alcohol use among adolescents.  Journal of Youth and Adolescence, 43 (7), 1163-1175.  DOI: 10.1007/s10964-013-0054-y. PMID: 24218067.

Hamilton, H. A., Danielson, A. M.*, Mann, R. E., & Paglia-Boak, A. (2012). The roles of family, peer, school, and attitudinal factors in cannabis use across immigrant generations of youth.  Journal of Drug Issues, 42, 46-58. DOI: 10.1177/0022042612436652.

Hamilton, H. A.  (2009). The persistence of maternal distress and symptoms of distress in adult offspring.  Social Psychiatry and Psychiatric Epidemiology, 44, 732-739.

Hamilton, H. A., Noh, S. & Adlaf, E. M. (2009). Adolescent risk behaviours and  psychological distress across immigrant generations. Canadian Journal of Public Health, 100, 221-225.

Hamilton, H. A., Noh, S. & Adlaf, E. M. (2009).  Perceived financial status, health, and maladjustment in adolescence. Social Science & Medicine, 68, 1527-1534.

BOOK

Hamilton, H.A. 2005. Health and behavior among immigrant youth.  New York: LFB Scholarly Publishing.