For more information on this topic, CDC recommends the following link: https://www.cdc.gov/sleep/about_sleep/sleep_hygiene.html
Footnotes
Estimates were based on household interviews of a sample of the civilian, noninstitutionalized U.S. population, with 95% CIs indicated by error bars.
Based on a response to the question, “On average, how many hours of sleep do you get in a 24-hour period?”
Based on a response to the question, “How many hours did you work last week at all jobs or businesses?”