The version of the article, “Homocysteine Improves Risk Stratification in Patients Undergoing Endarterectomy for Asymptomatic Internal Carotid Artery Stenosis” by Duschek et al that published online ahead-of-print on June 11, 2013, and appears in the August issue (Stroke. 2013;44:2311–2314) contained an error in the text.
In accordance with the STROBE criteria,1,2 the study has been reclassified as a single-center cohort study, as its participants were sampled on the basis of exposure and the outcome was assessed during follow-up.
1. Vandenbroucke JP, von Elm E, Altman DG, Gotzsche PC, Mulrow CD, Pocock SJ, et al. Strengthening the Reporting of Observational Studies in Epidemiology (STROBE): explanation and elaboration. Ann Intern Med. 2007;147:W163–W194.
2. Dekkers OM, Egger M, Altman DG, Vandenbroucke JP. Distinguishing case series from cohort studies. Ann Intern Med. 2012;156:37–40.
The authors regret the error.
This correction has been made to the online version of the article, which is available at http://stroke.ahajournals.org/content/44/8/2311.
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