Sleep Efficiency
Sleep % number
Percentage of time in bed actually spent sleeping.
Detailed Description
Calculated as total_sleep / time_in_bed × 100. Gold standard in sleep medicine (Buysse 2014). 85%+ is good, 90%+ is excellent. Chronically below 80% is a diagnostic criterion for insomnia.
How to Improve
- Don't lie in bed awake — get up after 20 minutes
- Use bed only for sleep
- Sleep restriction therapy