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ORIGINAL ARTICLE
Year : 2014  |  Volume : 2  |  Issue : 3  |  Page : 105-108

A comparison of warfarin utilisation in North America and Ireland


1 College of Pharmacy, Dalhousie University, Halifax, Nova Scotia, Canada
2 College of Pharmacy, Qatar University, Doha, Qatar
3 Applied Health Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, Toronto, Ontario; Institute for Health Policy, Management and Evaluation, Faculty of Medicine and Leslie Dan Faculty of Pharmacy, University of Toronto, Toronto, Ontario, Canada

Correspondence Address:
Muhammad Mamdani
Applied Health Research Centre of the Li Ka Shing Knowledge Institute of St. Michael's Hospital, University of Toronto Faculty of Medicine and Leslie Dan Faculty of Pharmacy, 30 Bond St. Toronto, ON M5B 1W8, Canada

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DOI: 10.4103/1658-600X.137883

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Background: The objective of this study was to compare warfarin utilisation trends in Canada, the United States, and Ireland between January 2005 and September 2011. Materials and Methods: We conducted a population-based cross-sectional time series analysis of warfarin utilisation data from January 2005 to September 2011 in the United States, Canada, and Ireland to examine differences in temporal trends in warfarin utilisation. Results: A nearly 50% higher warfarin utilisation rate was observed in Canada and Ireland relative to the United States - the average monthly warfarin utilisation rate was approximately 626 units per 1,000 people in Canada, 423 units per 1,000 people in the United States, and 630 units per 1,000 people in Ireland. However, relative rates of growth in warfarin utilisation were 25.1%, 15.3%, and 38.3% for the United States, Canada, and Ireland, respectively. Interpretation: Rates of warfarin utilisation differ considerably and geographically as evidenced by utilisation rates in the United States, Canada, and Ireland.


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