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Comment & Response |

Syncope While Driving in Denmark—Reply

Anna-Karin Numé, MD1; Mark A. Hlatky, MD2; Martin H Ruwald, MD, PhD1
[+] 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
JAMA Intern Med. 2016;176(8):1230-1231. doi:10.1001/jamainternmed.2016.3732.
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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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August 1, 2016
Carol Chen-Scarabelli, PhD; Tiziano M. Scarabelli, MD, PhD
1Birmingham VA Medical Center, Birmingham, Alabama
1Birmingham VA Medical Center, Birmingham, Alabama2University of Alabama at Birmingham (UAB) Medical Center, Birmingham, Alabama
JAMA Intern Med. 2016;176(8):1230. doi:10.1001/jamainternmed.2016.3723.
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