Portrait Cesar Leos-Toro

Cesar Leos-Toro, Dr.

Post-Doctoral Research Associate

Risk & Resilience

zIReN Collaboration Partner

Room number: AND 4.50



Dr. Cesar Leos Toro received his PhD from the University of Waterloo's School of Public Health & Health Systems where his doctoral research focused on examining the public health impact of nonmedical cannabis legalization in Canada. His work has evaluated and informed national interventions including restrictions on marketing, packaging and labelling, health warnings, retail policies and general cannabis health literacy among Canadian youth and young adults. He spent time with the World Health Organization’s (WHO) Department of Mental Health and Substance Abuse, the United Nations (UN) Office on Drugs and Crime, and the Canadian Institutes of Health Research as a Drug Safety and Effectiveness Cross-Disciplinary Trainee.

Overall, he is interested on the impact of substance use policy on subsequent health behaviors. His research interests include chronic disease prevention, health risk communication, and etiology of substance use disorders to best understand intervention points for the promotion of health and well-being along the life course.


Leos-Toro, Cesar, Meyer SB, Fong GT, Hammond D. Cannabis Health Knowledge and Risk Perceptions among Canadian Youth and Young Adults. Harm Reduction Journal, vol. 17, no. 1, 2020, doi:10.1186/s12954-020-00397-w.

Leos-Toro C, Meyer SB, Fong GT, Hammond D. Cannabis Labelling and Consumer Understanding of THC Levels and Serving Sizes. Drug and Alcohol Dependence, vol. 208, 2020, p. 107843., doi:10.1016/j.drugalcdep.2020.107843.

Goodman S, Wadsworth E, Leos-Toro C, Hammond D. Prevalence and Forms of Cannabis Use in Legal vs. Illegal Recreational Cannabis Markets. International Journal of Drug Policy, vol. 76, 2020, p. 102658., doi:10.1016/j.drugpo.2019.102658.

Wadsworth E, Leos-Toro C, Hammond D. Mental Health and Medical Cannabis Use among Youth and Young Adults in Canada. Substance Use & Misuse, vol. 55, no. 4, 2019, pp. 582–589., doi:10.1080/10826084.2019.1691594.

Goodman S, Leos-Toro C, Hammond D. The Impact of Plain Packaging and Health Warnings on Consumer Appeal of Cannabis Products. Drug and Alcohol Dependence, vol. 205, 2019, p. 107633., doi:10.1016/j.drugalcdep.2019.107633.

Leos-Toro C, Meyer SB, Fong GT, Hammond D. Perceptions of Effectiveness and Believability of Pictorial and Text-Only Health Warning Labels for Cannabis Products among Canadian Youth. International Journal of Drug Policy, vol. 73, 2019, pp. 24–31., doi:10.1016/j.drugpo.2019.07.001.

Goodman S, Leos-Toro C, Hammond D. Methods to Assess Cannabis Consumption in Population Surveys: Results of Cognitive Interviewing. Qualitative Health Research, vol. 29, no. 10, 2019, pp. 1474–1482., doi:10.1177/1049732318820523.

Goodman S, Leos-Toro C, Hammond D. Risk Perceptions of Cannabis- vs. Alcohol-Impaired Driving among Canadian Young People. Drugs: Education, Prevention and Policy, vol. 27, no. 3, 2019, pp. 205–212., doi:10.1080/09687637.2019.1611738.

Leos-Toro C, Rynard V, Murnaghan D, MacDonald J, Hammond D. Trends in Cannabis Use over Time among Canadian Youth: 2004–2014. Preventive Medicine, vol. 118, 2019, pp. 30–37., doi:10.1016/j.ypmed.2018.10.002.

Maynard M, Packull-McCormick S, Perlman CM, Leos-Toro C, Andrade L, Kirkpatrick SI. Food Insecurity and Mental Health among Females in High-Income Countries. International Journal of Environmental Research and Public Health, vol. 15, no. 7, 2018, p. 1424., doi:10.3390/ijerph15071424.

Leos-Toro C, Shiplo S, Hammond D. Perceived Support for Medical Cannabis Use among Approved Medical Cannabis Users in Canada. Drug and Alcohol Review, vol. 37, no. 5, 2018, pp. 627–636., doi:10.1111/dar.12823.

Leos-Toro C, Rynard V, Hammond D. Prevalence of Problematic Cannabis Use in Canada: Cross-Sectional Findings from the 2013 Canadian Tobacco, Alcohol and Drugs Survey. Canadian Journal of Public Health, vol. 108, no. 5-6, 2017, doi:10.17269/cjph.108.5955.

Minaker L, Bonham A, Elton-Marshall T, Leos-Toro C, Wild C, Hammond D. Under the Influence: Examination of Prevalence and Correlates of Alcohol and Marijuana Consumption in Relation to Youth Driving and Passenger Behaviours in Canada. A Cross-Sectional Study. CMAJ Open, vol. 5, no. 2, 2017, doi:10.9778/cmajo.20160168.

Leos-Toro C, Hammond D, Manske S. A Cross-Sectional Examination of Medicinal Substance Abuse and Use of Nonmedicinal Substances among Canadian Youth: Findings from the 2012-2013 Youth Smoking Survey. CMAJ Open, vol. 3, no. 4, 2015, doi:10.9778/cmajo.20140094.