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Ayden Scheim, PhD

Ayden Scheim

Assistant Professor
Epidemiology and Biostatistics
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BA, Sociology, University of Toronto, PhD, Epidemiology and Biostatistics, Western University (The University of Western Ontario)


Dr. Scheim is a social epidemiologist interested in understanding (and ultimately, transforming) the impacts of social, policy, and healthcare environments on the health of stigmatized populations. He conducts community-engaged research with LGBT populations and people who use drugs, as well as methodological research on the measurement of discrimination and other social-structural exposures.

Dr. Scheim has over 15 years of experience in the field of transgender health, and currently leads community-based studies with trans populations in the U.S., Canada, and India. He also serves on the revision committee for the 8th edition of the World Professional Association for Transgender Health Standards of Care. He is an Affiliate Scientist with the Centre on Drug Policy Evaluation at St. Michael’s Hospital in Toronto, where he leads a longitudinal cohort study evaluating supervised consumption services.

Dr. Scheim received a PhD in Epidemiology and Biostatistics (2017) from Western University in Canada where he was a Pierre Elliott Trudeau Foundation Scholar, and completed postdoctoral training at the University of California, San Diego as a Canadian Institutes of Health Research Fellow.

His personal website is

Research Interests

  • Global health or International health
  • Infectious Disease
  • Substance Use
  • Community Based Participatory Reseach
  • Social Epidemiology
  • Survey Research Methods
  • LGBT Health


Scheim AI, Knight R, Shulha H, Nosova E, Hayashi K, Milloy M-J, Kerr T, DeBeck K. Characterizing men who have sex with men and use injection drugs in Vancouver, Canada. AIDS & Behavior. Online ahead of print 20 July 2019.

Dharma C, Scheim AI, Bauer GR. Exploratory factor analysis of two sexual health scales for transgender people: Trans-specific condom/barrier negotiation self-efficacy (T-Barrier) and trans-specific sexual body image worries (T-Worries). Archives of Sexual Behavior. Online ahead of print 6 June 2019.

Scheim AI, Lyons C, Ezouatchi R, Liestman B, Drame F, Diouf D, Ba I, Bamba A, Kouame A, Baral S. (2019). Sexual behavior stigma and depression among transgender women and cisgender men who have sex with men in Côte d'Ivoire. Annals of Epidemiology, 33: 79-83.

Scheim AI, Bauer GR. (2019). The Intersectional Discrimination Index: Development and validation of measures of self-reported enacted and anticipated discrimination for intercategorical analysis. Social Science & Medicine, 226: 225-235.

Bauer GR, Scheim AI. (2019). Methods for analytic intercategorical intersectionality in quantitative research: Discrimination as a mediator of health inequalities. Social Science & Medicine, 226: 236-245.

Leonardi M, Frecker H, Scheim AI, Kives S. (2019). Reproductive health considerations in sexual and/or gender minority adolescents. Journal of Pediatric and Adolescent Gynecology, 32(1):15-20.

Scheim AI, Bauer GR. (2019). Sexual inactivity among transfeminine persons: A Canadian respondent-driven sampling survey. The Journal of Sex Research, 56(2): 264-271.

Scheim AI, Adam BD, Marshall Z. (2019). Gay, bisexual, and queer trans men navigating sexual fields. Sexualities, 22(4): 566-586.

Meyers SA, Scheim A, Jain S, Sun X, Milloy MJ, DeBeck K, Hayashi K, Garfein R, Werb D. (2018). Gender differences in the provision of injection initiation assistance: A comparison of three North American settings. Harm Reduction Journal, 15:59.

Scheim AI, Nosova E, Knight R, Hayashi K, Kerr T. (2018). HIV incidence among men who have sex with men and inject drugs in a Canadian setting. AIDS & Behavior, 22(12): 3957-3961.

Scheim AI, Bardwell G, Rachlis B, Mitra S, Kerr T. (2018). Syringe sharing among people who inject drugs in London, Canada. Canadian Journal of Public Health, 109: 174-182.

Kennedy MC, Scheim AI, Rachlis B, Mitra S, Bardwell G, Rourke S, Kerr T. (2018). Willingness to use drug checking within supervised injection services in a mid-sized Canadian city. Drug and Alcohol Dependence, 185: 248-252.

Poteat T, Malik M, Scheim A, Elliot A. (2017). HIV prevention among transgender populations: Knowledge gaps and evidence for action. Current HIV/AIDS Reports, 14(4): 141-152.

Scheim AI, Zong X, Giblon R, Bauer GR. (2017). Disparities in access to family physicians among transgender people in Ontario, Canada. International Journal of Transgenderism, 3: 343-352.

Mitra S, Rachlis B, Scheim A, Bardwell G, Rourke S, Kerr T. (2017). Acceptability and design preferences of supervised injection services among people who inject drugs in a mid-sized Canadian city. Harm Reduction Journal, 14:46.

Bardwell G, Scheim AI, Mitra S, Kerr T. (2017). Assessing support for supervised injection services among community stakeholders in London, Canada. International Journal of Drug Policy, 48: 27-33.

Bauer GR, Braimoh J, Scheim AI, Dharma C. (2017). Transgender-inclusive measures of sex/gender for population surveys: Mixed-methods evaluation and recommendations. PLoS ONE, 12(5): e0178043.

Scheim AI, Bauer GR, Shokoohi M. (2017). Drug use among transgender people in Ontario, Canada: Disparities and associations with social exclusion. Addictive Behaviors, 72: 151-158.

Scheim AI, Rachlis B, Bardwell G, Mitra S, Kerr T. (2017). Public drug injecting in London, Ontario: A cross-sectional survey. Canadian Medical Association Journal Open, 5: e290-e294.

Scheim AI, Bauer GR, Travers R. (2017). HIV-related sexual risk among transgender men who are gay, bisexual, or have sex with men. Journal of Acquired Immune Deficiency Syndromes, 74: e89-e96.

Additional Publications on PubMed