Dr. William Gardner

Dr. William Gardner
Dr. William Gardner
Senior Research Scientist and Senior Research Chair in Child and Adolescent Psychiatry, Children's Hospital of Eastern Ontario Research Institute


401 Smyth Road, Ottawa, ON, K1H 8L1


William Gardner is a child psychologist and mental health services researcher. He studies child and population mental health, self-harming behaviour and substance misuse, statistical methods, psychiatric measurement, and health system change. Dr. Gardner is a senior research scientist at the Children’s Hospital of Eastern Ontario (CHEO, Ottawa, ON), a professor of epidemiology at the University of Ottawa, and the CHEO RI and University of Ottawa Chair in Child and Adolescent Psychiatry. His current research is supported by the Canadian Institutes for Health Research, the ScotiaBank Foundation, Robert Wood Johnson Foundation, the Public Health Agency of Canada, and the US Centers for Disease Control. His research has been published in Science, the New England Journal of Medicine, JAMA, JAMA Pediatrics, JAMA Psychiatry, CMAJ, the Canadian Journal of Psychiatry, Pediatrics, Health Services Research, the American Psychologist, the Psychological Bulletin, Developmental Psychology, and Psychometrika.

Recent publications

  • Gardner, W., Pajer, K. Cloutier, P., Currie, L., Colman, I., Zemek, R., Hatcher, S., Lima, I., & Cappelli, M., Five-Year Health Outcomes Associated with Adolescents’ Emergency Department Visits for Self-Harm: A Propensity-Matched Cohort Study, CMAJ, Volume in press (2019)
  • Thériault, F., Hawes, R., Garber, B., Momoli, F., Gardner, W., Zamorski, M., & Colman, I., Incidence of major depression diagnoses in the Canadian Armed Forces: Longitudinal analysis of clinical and health administrative data, Social Psychiatry and Psychiatric Epidemiology (2019)
  • Kamimura-Nishimura, K., Epstein, J., Froehlich, T., Peugh, J., Brinkman, B., Baum, R., Gardner, W., Langberg, J., Lichtenstein, P., Chen, D., Kelleher, K., Factors Associated with Attention Deficit Hyperactivity Disorder Medication Use in Community Care Settings, Journal of Pediatrics, Volume 213, 155-162.e1 (2019)
  • Gardner, W., Pajer, K., Cloutier, P., Zemek, R., Currie, L., Hatcher, S., Colman, I., Bell, D., Gray, C., Cappelli, M., Rodriguez Duque, D., & Lima, I., Changing Rates of Self-Harm and Mental Disorders by Sex in Youths Presenting to Ontario Emergency Departments: Repeated Cross-Sectional Study, Canadian Journal of Psychiatry (2019)

Research interests

  • Children's mental health services
  • Measurement of health outcomes and quality of care
  • Health Policy
  • Health system change
  • Health equity