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Letters |15 September 1996

Surgical Treatment of Asymptomatic Carotid Stenosis

John E. Castaldo, MD; James F. Toole, MD; Virginia J. Howard, MSPH

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  • ACAS Executive Committee, Winston-Salem, NC 27157-1078
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TO THE EDITOR:
The article by Barnett and colleagues on the surgical treatment of asymptomatic carotid artery disease [1] deserves some clarification. First, the authors appear to misinterpret the failure to find statistically significant effects as implying the absence of an effect. The Asymptomatic Carotid Atherosclerosis Study (ACAS) was not designed to have good power to find differences in “disabling strokes” alone, to compare the treatments in women alone, or to evaluate differences in treatment effect between men and women.
Second, we agree with the authors that Doppler flow velocities reflect the cross-sectional area change of a vessel. It is...
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Castaldo JE, Toole JF, Howard VJ. Surgical Treatment of Asymptomatic Carotid Stenosis. Ann Intern Med. 1996;125:516–517. doi: 10.7326/0003-4819-125-6-199609150-00024

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Published: Ann Intern Med. 1996;125(6):516-517.

DOI: 10.7326/0003-4819-125-6-199609150-00024

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Print ISSN: 0003-4819 | Online ISSN: 1539-3704

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