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My Year of Sleep. Kathryn Snow. “ Chronic insomnia ” – delayed sleep phase Natural sleep time: ~5am Natural wake time: ~2pm Working 9 to 5: hell on wheels. Background. Started in April 2012 ~230 nights Previous nights ’ sleep Caffeine (yes or no, early or late) Exercise
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My Year of Sleep Kathryn Snow
“Chronic insomnia” – delayed sleep phase • Natural sleep time: ~5am • Natural wake time: ~2pm • Working 9 to 5: hell on wheels Background
Started in April 2012 • ~230 nights • Previous nights’ sleep • Caffeine (yes or no, early or late) • Exercise • Vitamin D supplements • Alcohol • Melatonin • Modafinil Data
Hours Sleep vs Bed Time 1 extra hour’s sleep = fall asleep ~10min later (95% CI: 2.4min,17min. p<0.01)
Woke Up vs. Bed Time Wake up 1hr later = fall asleep ~15min later (95% CI: 9min, 21min. P<0.001)