National Sleep Foundation

Chapter 5: Circadian Rhythm Sleep Disorders

Consequences

What are the consequences of Irregular Sleep Wake Type (IST)? 

People with Non-24 experience insomnia and excessive daytime sleepiness stemming from the abnormal synchronization between their circadian rhythms and normal sleep-wake cycles.55

In addition, they also experience problems with social, emotional, and other areas of life, due to their condition.56 For example, they may have trouble maintaining employment, caring for their children, and managing their social lives. These challenges “in day-to-day activities can contribute to feelings of depression. For people who are already suffering from depression, these impairments in daytime alertness and nighttime sleep can make their depression worse.”57

References

55. 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.

56. 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.

57.  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.