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Wake Time After Sleep Onset (WASO)

Last updated: May 8, 2018

What Does Wake Time After Sleep Onset (WASO) Mean?

Wake Time After Sleep Onset (WASO) is a statistic used in sleep studies to determine the amount of time a person spends awake, starting from when they first fall asleep to when they become fully awake and do not attempt to go back to sleep. The normal unit of measure for this statistic is minutes.

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WorkplaceTesting Explains Wake Time After Sleep Onset (WASO)

Wake Time After Sleep Onset (WASO) is measured when sleep studies are conducted on people who experience difficulty in staying asleep. People who suffer from sleep apnea, stress, insomnia, restless leg syndrome, weak bladder, or arthritis tend to have difficulty sleeping. Pregnant or menopausal women are also often sufferers of sleep disturbances. Wake Time After Sleep Onset is one of the values used to calculate Sleep Period Time in sleep studies. The sum of Total Sleep Time and Wake Time After Sleep Onset result in Sleep Period Time. Wake Time After Sleep Onset should average 5% of Sleep Period Time in 20 year old subjects and 15% in 60 year old subjects.

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Sleep ApneaWorkplace HealthWorker Health Monitoring

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