Examining the Biological Factors That Affect Sleep Duration

Completed

Conditions studied: Sleep, Circadian Rhythm, Cognitive Performance

In brief

Sleep is necessary for healthy functioning, and people who sleep too little or too much may have an increased risk of developing health problems. This study will examine people who regularly sleep for short or long amounts of time to understand the biological factors that determine how much sleep a person needs.

Key facts

Study ID

NCT00607204

Run by

Brigham and Women's Hospital

People needed

119

Starts

2005-10-01

Expected to finish

2011-11-01

Last updated by the study team

2013-07-31

Who can join

Age: 18 and older, up to 35. Sex: any. Healthy volunteers: accepted.

You may qualify if…

• Routinely sleeps 6.5 hours or less a night, or routinely sleeps 9 hours or more a night
• In good health

You may not qualify if…

• Diagnosed with a sleep disorder
• Currently uses medications
• Performed night shift work in the 3 years before study entry
• History of psychiatric illness

Where it is running

• Brigham & Women's Hospital — Boston, Massachusetts, United States

Full record on ClinicalTrials.gov

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