Please note: Dr. Hwang is not taking any summer students.

Research Interests

Homelessness, housing as a social determinant of health, health care for homeless persons, marginalized populations, inner city health, urban health, socioeconomic status, access to care, community-based health care, health services research.

Research Activities

Dr. Hwang’s research program focuses on interventions to improve the health of people experiencing homelessness, and to interrupt chronic homelessness itself.


Recent Publications

  1. Liu, M, Koh, KA, Hwang, SW, Wadhera, RK. Mental Health and Substance Use Among Homeless Adolescents in the US. JAMA. 2022;327 (18):1820-1822. doi: 10.1001/jama.2022.4422. PubMed PMID:35536272 .
  2. Mejia-Lancheros, C, Alfayumi-Zeadna, S, Lachaud, J, O'Campo, P, Gogosis, E, Da Silva, G et al.. Differential impacts of COVID-19 and associated responses on the health, social well-being and food security of users of supportive social and health programs during the COVID-19 pandemic: A qualitative study. Health Soc Care Community. 2022; :. doi: 10.1111/hsc.13826. PubMed PMID:35524402 .
  3. Lee, SH, Hwang, SW, Park, SH, Yang, DH, Byeon, JS, Myung, SJ et al.. Fecal S100A12 is associated with future hospitalization and step-up of medical treatment in patients with Crohn's disease in clinical remission: a pilot study. Intest Res. 2022;20 (2):203-212. doi: 10.5217/ir.2021.00020. PubMed PMID:35508954 PubMed Central PMC9081997.
  4. Sayani, A, Maybee, A, Manthorne, J, Nicholson, E, Bloch, G, Parsons, JA et al.. Equity-Mobilizing Partnerships in Community (EMPaCT): Co-Designing Patient Engagement to Promote Health Equity. Healthc Q. 2022;24 (SP):86-92. doi: 10.12927/hcq.2022.26768. PubMed PMID:35467517 .
  5. Liu, M, Richard, L, Campitelli, MA, Nisenbaum, R, Dhalla, IA, Wadhera, RK et al.. Hospitalizations During the COVID-19 Pandemic Among Recently Homeless Individuals: a Retrospective Population-Based Matched Cohort Study. J Gen Intern Med. 2022;37 (8):2016-2025. doi: 10.1007/s11606-022-07506-4. PubMed PMID:35396658 PubMed Central PMC8992790.
  6. Sayani, A, Manthorne, J, Nicholson, E, Bloch, G, Parsons, JA, Hwang, SW et al.. Toward equity-oriented cancer care: a Strategy for Patient-Oriented Research (SPOR) protocol to promote equitable access to lung cancer screening. Res Involv Engagem. 2022;8 (1):11. doi: 10.1186/s40900-022-00344-y. PubMed PMID:35382905 PubMed Central PMC8980795.
  7. Czechowski, K, Sylvestre, J, Gogosis, E, Agha, A, Kerman, N, Polillo, A et al.. Cycles of instability: Proximal and distal influences on residential instability among people with histories of homelessness in three Canadian cities. J Community Psychol. 2022; :. doi: 10.1002/jcop.22843. PubMed PMID:35322426 .
  8. Kiran, T, Craig-Neil, A, Das, P, Lockwood, J, Wang, R, Nathanielsz, N et al.. Association of Homelessness with COVID-19 Positivity among Individuals Visiting a Testing Centre: A Cross-Sectional Study. Healthc Policy. 2022;17 (3):34-41. doi: 10.12927/hcpol.2022.26730. PubMed PMID:35319442 PubMed Central PMC8935920.
  9. Shariff, SZ, Richard, L, Hwang, SW, Kwong, JC, Forchuk, C, Dosani, N et al.. COVID-19 vaccine coverage and factors associated with vaccine uptake among 23 247 adults with a recent history of homelessness in Ontario, Canada: a population-based cohort study. Lancet Public Health. 2022;7 (4):e366-e377. doi: 10.1016/S2468-2667(22)00037-8. PubMed PMID:35278362 PubMed Central PMC8906815.
  10. Liu, M, Richard, L, Campitelli, MA, Nisenbaum, R, Dosani, N, Dhalla, IA et al.. Drug Overdoses During the COVID-19 Pandemic Among Recently Homeless Individuals. Addiction. 2022;117 (6):1692-1701. doi: 10.1111/add.15823. PubMed PMID:35129239 PubMed Central PMC9111216.
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Affiliations & Other Activities

  • Scientist, Li Ka Shing Knowledge Institute, St. Michael’s Hospital
  • Staff Physician, Division of General Internal Medicine, St. Michael’s Hospital
  • Director, Division of General Internal Medicine, University of Toronto
  • Professor, Department of Medicine, University of Toronto
  • Professor, Dalla Lana School of Public Health, University of Toronto
  • Professor, Institute of Health Policy, Management and Evaluation, University of Toronto