Central Disorders of Hypersomnolence
Insufficient Sleep Syndrome
Insufficient sleep syndrome occurs when you don’t get enough good-quality sleep to meet your body’s needs. Some people restrict their sleep because of social pressures; others may work multiple jobs or have responsibilities and simply don’t have enough opportunities to sleep. To be considered ISS, the sleep restriction must occur most days, last for at least 3 months, and result in poor functioning and excessive sleepiness during the wake period. ISS increases the risk of an accident or even death.
A 2016 Centers for Disease Control and Prevention estimated that approximately 35% of adults in the United States sleep less than the recommended 7 hours.6
No formal testing is required to make the diagnosis of ISS. In addition to the symptoms mentioned in the background, a diagnosis of ISS requires that a few other criteria be met.
1. Silber MH, Krahn LE, Olson EJ, Pankratz VS. The epidemiology of narcolepsy in Olmsted County, Minnesota: a population-based study. Sleep. 2002;25(2):197-202.
2. Acquavella J, Mehra R, Bron M, Suomi JM, Hess GP. Prevalence of narcolepsy and other sleep disorders and frequency of diagnostic tests from 2013-2016 in insured patients actively seeking care. J Clin Sleep Med. 2020;16(8):1255-1263.
3. Kallweit U, Nilius G, Trumper D, Vogelmann T, Schubert T. Prevalence, incidence, and health care utilization of patients with narcolepsy: a population-representative study. J Clin Sleep Med. 2022.
4. Scheer D, Schwartz SW, Parr M, Zgibor J, Sanchez-Anguiano A, Rajaram L. Prevalence and incidence of narcolepsy in a US health care claims database, 2008-2010. Sleep. 2019;42(7).
5. American Academy of Sleep Medicine. International Classification of Sleep Disorders. Darien, IL: American Academy of Sleep Medicine, 3rd ed.; 2014.
6. Liu Y, Wheaton AG, Chapman DP, al. e. Prevalence of healthy sleep duration among adults: United States, 2014. Morbidity and Mortality Weekly. 2016;65(6):137-141.