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Ayden Scheim, PhD

Ayden Scheim

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


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 measuring intersectional social positions and experiences of discrimination.

Currently, Dr. Scheim leads community-based participatory research surveys with transgender populations in India and Canada funded by the National Institutes of Health and the Canadian Institutes of Health Research. He is also PI of an NIH-funded study to cognitively and psychometrically evaluate intersectional discrimination measures in English and Spanish. Dr. Scheim holds adjunct appointments in the Centre on Drug Policy Evaluation at St. Michael’s Hospital (Toronto, Canada) and in the Department of Epidemiology and Biostatistics at Western University (London, Canada).

Dr. Scheim received a PhD in Epidemiology and Biostatistics (2017) from Western University in Canada where he was a Pierre Elliott Trudeau Foundation and Vanier Canada Graduate 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, Bauer GR, Bastos JL, Poteat T. Advancing intersectional discrimination measures for health disparities research: Protocol for a mixed-methods bilingual measurement study. JMIR Research Protocols. 2021;10(8):e30987.

Scheim AI, Sniderman R, Wang R, Bouck Z, McLean E, Mason K, Bardwell G, Mitra S, Greenwald ZR, Thavorn K, Garber G, Baral SD, Rourke SB, Werb D. The Ontario Integrated Supervised Injection Services cohort study of people who inject drugs in Toronto, Canada (OiSIS-Toronto): Cohort profile. Journal of Urban Health. 2021 [Epub ahead of print].

Chakrapani V, Scheim AI, Newman PA, Shunmugam M, Rawat S, Baruah D, Bhatter A, Nelson R, Jaya A, Kaur M. Affirming and negotiating gender in family and social spaces: Stigma, mental health and resilience among transmasculine people in India. Culture, Health & Sexuality. 2021 [Epub ahead of print].

Roth AM, Mitchell AK, Mukherjee R, Scheim AI, Ward KM, Lankenau SE. Prevalence and correlates of syringe disposal box use in a Philadelphia neighborhood with high levels of public drug injection. Substance Use & Misuse. 2021;56(5):668-673.

Meyers SA, Rafful C, Mittal ML, Tirado-Muñoz J, Smith LR, Jain S, Sun X, Garfein R, Strathdee S, DeBeck K, Hayashi K, McNeil R, Milloy M-J, Olding M, Guise A, Werb D, Scheim AI. Examining the gender composition of drug injecting initiation events: A mixed methods investigation of three North American contexts. International Journal of Drug Policy 2021; 90:103056.

Scheim AI, Bouck Z, Tookey P, Hopkins S, Sniderman R, McLean E, Garber G, Baral S, Rourke SB, Werb D. Supervised consumption service use and recent non-fatal overdose among people who inject drugs in Toronto, Canada. International Journal of Drug Policy 2021; 87:102993.

Rich A, Scheim AI, Koehoorn M, Poteat T. Non-HIV chronic disease burden among transgender populations globally: A systematic review and narrative synthesis. Preventive Medicine Reports 2020: 20:101259.

Scheim AI, Kacholia V, Logie CH, Chakrapani V, Ranade K, Gupta S. Health of transgender men in low- and middle-income countries: A scoping review. BMJ Global Health 2020; 5:e003471.

Gicquelais RE, Werb D, Marks C, Ziegler C, Mehta SH, Genberg BL, Scheim AI. Prevalence and correlates of providing and receiving assistance with the transition to injection drug use. Epidemiologic Reviews 2020;42(1):4-18

Scheim AI, Maghsoudi N, Marshall Z, Churchill C, Ziegler C, Werb D. Impact evaluations of drug decriminalisation and legal regulation on drug use, health and social harms: A systematic review. BMJ Open 2020; 10:e035148.

Scheim AI, Perez-Brumer AG, Bauer GR. Gender-concordant identity documents and mental health among transgender adults in the United States: A cross-sectional survey. The Lancet Public Health 2020; 5(4): E196-E203.

Additional Publications on PubMed