• Debra Eagles, Ian G Stiell, Catherine M Clement, Jamie Brehaut, Monica Taljaard, Anne-Maree Kelly, Suzanne Mason, Arthur Kellermann, and Jeffrey J Perry.
• Department of Emergency Medicine, University of Ottawa, Ottawa, Ontario, Canada.
• Acad Emerg Med. 2008 Dec 1;15(12):1256-61.

ObjectivesThe derivation and validation studies for the Canadian Cervical-Spine (C-Spine) Rule (CCR) and the Canadian Computed Tomography (CT) Head Rule (CCHR) have been published in major medical journals. The objectives were to determine: 1) physician awareness and use of these rules in Australasia, Canada, the United Kingdom, and the United States and 2) physician characteristics associated with awareness and use.MethodsA self-administered e-mail and postal survey was sent to members of four national emergency physician (EP) associations using a modified Dillman technique. Results were analyzed using repeated-measures logistic regression models.ResultsThe response rate was 54.8% (1,150/2,100). Reported awareness of the CCR ranged from 97% (Canada) to 65% (United States); for the CCHR it ranged from 86% (Canada) to 31% (United States). Reported use of the CCR ranged from 73% (Canada) to 30% (United States); for the CCHR, it was 57% (Canada) to 12% (United States). Predictors of awareness were country, type of rule, full-time employment, younger age, and teaching hospital (p < 0.05). Significant differences in use of the CCR by country were observed, but not for the CCHR. Teaching hospitals were more likely to use the CCR than nonteaching hospitals, but less likely to use the CCHR.ConclusionsThis large international study found notable differences among countries with regard to knowledge and use of the CCR and CCHR. Awareness and use of both rules were highest in Canada and lowest in the United States. While younger physicians, those employed full-time, and those working in teaching hospitals were more likely to be aware of a decision rule, age and employment status were not significant predictors of use. A better understanding of factors related to awareness and use of emergency medicine (EM) decision rules will enhance our understanding of knowledge translation and facilitate strategies to enhance dissemination and implementation of future rules.

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