CMAJ • June 19, 2007; 176 (13). doi:10.1503/cmaj.061174.
© 2007 Canadian Medical Association or its licensors
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Effect of widespread restrictions on the use of hospital services during an outbreak of severe acute respiratory syndrome

Michael J. Schull, Thérèse A. Stukel, Marian J. Vermeulen, Merrick Zwarenstein, David A. Alter, Douglas G. Manuel, Astrid Guttmann, Andreas Laupacis and Brian Schwartz

From the Institute for Clinical Evaluative Sciences (Schull, Stukel, Vermeulen, Zwarenstein, Alter, Manuel, Guttmann, Laupacis); the Clinical Epidemiology Unit (Schull, Stukel, Laupacis), the Department of Emergency Services (Schull, Schwartz) and the Sunnybrook–Osler Centre for Pre-Hospital Care (Schwartz), Sunnybrook Health Sciences Centre; the Departments of Medicine (Schull, Alter, Laupacis) and Health Policy, Management and Evaluation (Schull, Stukel, Zwarenstein, Alter, Manuel, Guttmann, Laupacis), University of Toronto; and the Division of Paediatric Medicine (Guttmann), The Hospital for Sick Children, Toronto, Ont.


Figure 113
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  		Fig. 1: Hospital services utilization in Toronto and comparison regions in Ontario (Ottawa and London) during the 2003 outbreak of severe acute respiratory syndrome (SARS). Adjusted relative changes (and 95% confidence intervals) are presented in the rates of hospital admissions, cardiac procedures, emergency department visits and inter-hospital patient transfers during the early (Mar. 15 to May 14, 2003) and late (May 15 to July 14, 2003) hospital utilization restriction periods compared with baseline rates during the pre-SARS period (March 2000 to March 2003). Note: CABG = coronary artery bypass graft, PCI = percutaneous coronary intervention.

 

Figure 213
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  		Fig. 2: Weekly rates of all-cause hospital admissions in Toronto and 2 comparison regions (Ottawa and London, Ont.) before the 2003 outbreak of severe acute respiratory syndrome (SARS; Mar. 14, 2000, to Mar. 14, 2003), during the early (Mar. 15, 2003, to May 14, 2003) and late (May 15, 2003, to July 14, 2003) restriction periods, and after the restrictions had been lifted (July 2003 to March 2004).