7A61/G47.2 Advanced sleep-wake phase disorder



Advanced sleep-wake phase disorder (ASWPD) is a circadian rhythm disorder in which the body’s sleep-wake cycle is shifted in a delayed manner. This means that individuals with ASWPD generally go to bed and wake up at a much later time than is considered “normal” by societal standards. It is believed to be caused by a combination of genetic, environmental, and lifestyle factors.


ASWPD is typically diagnosed by a medical professional through a combination of patient history, physical examination, and specialized testing. Additionally, the patient’s sleep habits and patterns may be monitored over a period of several weeks.

Differential diagnosis

ASWPD is often misdiagnosed as delayed sleep phase syndrome (DSPS), which is another type of circadian rhythm disorder. The two disorders are distinct, however, and can be distinguished by their etiology and symptoms.


ASWPD is typically treated with lifestyle modifications such as improving sleep hygiene, avoiding stimulants, and following a regular sleep schedule. Additionally, light therapy and medications may be used to help shift the body’s internal clock.


ASWPD is a chronic condition, but with proper treatment, it is possible to manage symptoms and improve quality of life.

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