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Critical Care Medicine

Hanna Wunsch
Dr. Hannah Wunsch

Senior scientist

Sunnybrook Health Sciences Centre
2075 Bayview Ave., Room D1 08
Toronto, ON
M4N 3M5

Phone: 416-480-6100 ext. 65022
Fax: 416-480-4999

Executive Assistant: Meredith Malloy
Phone: 416-480-6100 ext. 62895


  • A.B., 1997, biology, Harvard University, U.S.
  • M.Sc., 2002, epidemiology, London School of Hygiene & Tropical Medicine, U.K.
  • MD, 2003, Washington University in St. Louis, U.S.
  • 2003–2004, internship, internal medicine, Columbia University Medical Center, U.S.
  • 2004–2007, residency, anesthesiology, Columbia University Medical Center, U.S.
  • 2007–2008, fellowship, critical care medicine, Columbia University Medical Center, U.S.

Appointments and Affiliations:

  • Senior scientist, Evaluative Clinical Sciences, Tory Trauma Research Program, Sunnybrook Research Institute
  • Staff physician, department of critical care medicine, Sunnybrook Health Sciences Centre
  • Professor, department of anesthesia and interdepartmental division of critical care, U of T
  • Visiting assistant professor, department of anesthesiology, Columbia University, U.S.

Research Foci:

  • Intensive care unit occupancy and resource use
  • Long-term outcomes after critical illness
  • International comparisons in critical care
  • Pharmaco-epidemiology of critical illness

Research Summary:

The focus of Dr. Wunsch’s research is on the organization and management of critical care services. In particular, she studies international comparisons of critical care, the use of large databases to understand resource utilization and long-term outcomes among critically ill patients and prescribing patterns.

Selected Publications:

See current publications on PubMed.

  1. Vail E, Gershengorn HB, Hua M, Walkey AJ, Rubenfeld G, Wunsch H. Association between US norepinephrine shortage and mortality among patients with septic shock. JAMA. 2017 Apr 11;317(14):1433–42.
  2. Gershengorn HB, Harrison DA, Garland A, Wilcox ME, Rowan KM, Wunsch H. Association of intensive care unit patient-to-intensivist ratios with hospital mortality. JAMA Intern Med. 2017 Mar 1;177(3):388–96.
  3. Wunsch H, Christiansen C, Johansen MB, Olsen M, Ali N, Angus DC, Sorensen HT. Psychiatric diagnoses and psychoactive medication use among nonsurgical critically ill patients receiving mechanical ventilation. JAMA. 2014 Mar 19;311(11):1133–42.
  4. Wunsch H, Guerra C, Barnato AE, Angus DC, G Li, Linde-Zwirble WT. Three-year mortality after intensive care for medicare beneficiaries in the United States. JAMA. 2010 Mar 3;303(9):849–56.

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