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Comment & Response
August 2016

Syncope While Driving in Denmark—Reply

Author Affiliations
  • 1University of Copenhagen Herlev Gentofte Hospital, Hellerup, Denmark
  • 2Departments of Medicine and Health Research and Policy, Stanford University School of Medicine, Stanford, California

Copyright 2016 American Medical Association. All Rights Reserved. Applicable FARS/DFARS Restrictions Apply to Government Use.

JAMA Intern Med. 2016;176(8):1230-1231. doi:10.1001/jamainternmed.2016.3732

In Reply We thank Chen-Scarabelli and Scarabelli for their interest in our study.1 We acknowledge that our study lacks data on the causes of syncope and cannot estimate risk attributable to specific causes of syncope. Our study was based on hospital International Classification of Diseases diagnosis codes, which do not specify the etiology of syncope. Many cases of syncope remain of unknown origin, however, and clinicians will still need to evaluate patient fitness to drive after an episode of syncope. Our study of a nationwide cohort of 41 039 adult patients with a primary discharge diagnosis of syncope is representative of the most common clinical presentations of syncope.2

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