Sleep efficiency

As a sleep efficiency of the percentage of sleep time is referred to at the designated time for sleep. It is one of the central information in the assessment of sleep disorders (insomnias) in the examination in the sleep laboratory and is also used in a modified way in the context of "sleep restriction", a behavioral approach in the treatment of certain insomnias.

Measurement in the sleep laboratory

During the sleep medical examination in the sleep laboratory, sleep efficiency is determined as part of polysomnography . It indicates the proportion of epochs with sleep ( total sleep time ) during the duration of the measurement ( total recording time ).

Sleep efficiency alone is insufficient to diagnose insomnia or any other sleep disorder. However, it plays a major role in the subjective quality assessment and this personal assessment can have a strong discrepancy between the sleep efficiency measured and the sleep efficiency. Sleep efficiency of 90% or more is perceived as satisfactory. From a sleep efficiency of less than 80 - 85%, poor sleep begins. Because of the discrepancy, people with insomnia tend to assess their sleep as worse than it actually is, which in turn can be detrimental to the quality of sleep. A study from 1993 found the sleep efficiency of normal sleepers to be 95.7 ± 3.1%.

Sleep efficiency according to sleep protocol

Sleep restriction is used as a method to treat certain insomnias. Here, the patient must determine the sleep efficiency over a certain period of time from self-records and adjust the bed times for the subsequent period according to the specifications.

In these cases, sleep efficiency is calculated using a self- guided sleep diary as follows:

${\ displaystyle {\ text {Sleep efficiency}} = {\ frac {\ text {Sleep duration}} {\ text {Bedtime}}} \ cdot 100}$

Web links

Individual evidence

↑ American Academy of Sleep Medicine (Ed.): The AASM Manual for Scoring Sleep and Associated Events. Rules, technology and technical specifications . 1st edition. Steinkopff-Verlag, Heidelberg 2008, ISBN 978-3-7985-1851-3 .
↑ Jürgen Margraf : Textbook of behavior therapy. Volume 2: Disorders in Adulthood - Special Indications - Glossary Springer Science & Business Media, 2008, ISBN 978-3-540-79542-1 , p. 214 ( limited preview in Google book search).
↑ Britta Stuff and Jennifer Wilton: When you're still tired after eight hours of sleep. In: welt.de . May 25, 2009, accessed on July 9, 2015 : “We look in the sleep laboratory to see how long someone was awake during the night. If that was more than 15 percent, he slept badly. "
^ Battaglia, Marco, et al. "Ambulatory polysomnography of never-depressed borderline subjects: a high-risk approach to rapid eye movement latency." Biological psychiatry 33.5 (1993): 326-334.

[scoring2008-1] American Academy of Sleep Medicine (Ed.): The AASM Manual for Scoring Sleep and Associated Events. Rules, technology and technical specifications . 1st edition. Steinkopff-Verlag, Heidelberg 2008, ISBN 978-3-7985-1851-3 .

[books-5wbjyDlV7ZoC-214-2] Jürgen Margraf : Textbook of behavior therapy. Volume 2: Disorders in Adulthood - Special Indications - Glossary Springer Science & Business Media, 2008, ISBN 978-3-540-79542-1 , p. 214 ( limited preview in Google book search).

[welt-3799963-3] Britta Stuff and Jennifer Wilton: When you're still tired after eight hours of sleep. In: welt.de . May 25, 2009, accessed on July 9, 2015 : “We look in the sleep laboratory to see how long someone was awake during the night. If that was more than 15 percent, he slept badly. "

[4] Battaglia, Marco, et al. "Ambulatory polysomnography of never-depressed borderline subjects: a high-risk approach to rapid eye movement latency." Biological psychiatry 33.5 (1993): 326-334.