A risk factor is something that increases your likelihood of getting a disease or condition.
Very little is known about the risk factors for
narcolepsy. Narcolepsy seems to run in some families. About 8%-30% of people with narcolepsy have another family member with the condition.
Chen L, Fong SY, et al. The familial risk and HLA susceptibility among narcolepsy patients in Hong Kong, Chinese.
Narcolepsy. EBSCO DynaMed website. Available at:
http://www.ebscohost.com/dynamed. Updated March 6, 2013. Accessed June 3, 2013.
What is narcolepsy? National Heart, Lung, and Blood Institute. National Institutes of Health
website. Available at:
Updated November 1, 2010. Accessed June 3, 2013.
Last reviewed May 2014 by Marcin Chwistek, MD
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