What are the risk factors for non-24 hour sleep wake disorder?
Total blindness is the most common predisposing condition for for Non-24.
Total blindness is the most common predisposing condition for Non-24.
Among sighted individuals, it is thought that psychiatric conditions (i.e., depression, personality disorders)58 may increase the risk for Non-24 “by changing or removing social time cues.”59
58. National Sleep Foundation (NSF), Non-24-Hour Sleep Wake Disorder: Associations with Depression, Arlington, VA: NSF, 2014. Online at: http://sleepfoundation.org/non-24/content/associations-depression.
59. Reid KJ and Zee PC. “Circadian disorders of the sleep-wake cycle,” in Kryger M, Roth T, Dement W (ed.), Principles and Practice of Sleep Medicine (5th Edition), St. Louis: Elsevier Saunders, 2011, pages 470-482.