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  • Title: Geographic variation in the rate of carotid endarterectomy in Canada.
    Author: Feasby TE, Quan H, Ghali WA.
    Journal: Stroke; 2001 Oct; 32(10):2417-22. PubMed ID: 11588335.
    Abstract:
    UNLABELLED: Background and Purpose-- Carotid endarterectomy (CEA) is an important method of stroke prevention, but its usage in Canada is not well known. The indications for CEA have been well informed by the recent clinical trials, but the impact of this information on the rate and regional variation in the rate of CEA is unknown. This study sought to determine the rate and the regional variation in the rate of CEA in Canada, its provinces, and census divisions for 1994-1997. METHODS: Discharge data from all hospitals in Canada except Quebec were obtained from the Canadian Institute for Health Information for 1994-1997 and were searched for CEA by residential site. Rates and variations in rates were calculated. RESULTS: The national age- and sex-adjusted rate per 100 000 people of CEA for those aged >/=40 years rose from 31.7 in 1994 to 40.5 in 1997. Provincial rates in 1997 varied from a low of 25.7 in Saskatchewan to high of 82.8 in Prince Edward Island. The census division rates varied even more, from a low of 0 in several divisions to a high of 179. CONCLUSIONS: The recent slight increase in CEA rates may reflect the release of new efficacy results for CEA, especially for asymptomatic carotid stenosis, but the rates are still far below US levels. The marked regional variation in rates may reflect differing views on the appropriateness of indications such as asymptomatic carotid stenosis for CEA and the inconsistency of published clinical practice guidelines.
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