The CDC calls insufficient sleep a "public health problem." But sleep & circadian rhythms are oft-ignored—even derided--aspects of health.
When you ask subjects about lifestyle, don't stop @ diet/exercise. Ask about sleep. When you ask about sleep, don't stop @ length/quality. Ask about circadian timing: when ppl sleep. Is timing dictated by their body clock *or* work/family demands?
AOU is an unprecedented opp to associate sleep deprivation & circadian mistiming with physical/mental illness.