Posted on 07/18/2006 10:18:23 AM PDT by Slings and Arrows
You Sleep Less Than You Think You Do
White Women Sleep Most, Black Men Sleep Least By Daniel DeNoon
WebMD Medical News Reviewed By Louise Chang, MD on Thursday, July 06, 2006
July 6, 2006 -- You're getting less sleep than you think, a study of 669 people in Chicago, shows.
Ask most folks, and they'll say they get less sleep than they like.
But if you then ask how long they sleep, they're likely to say they get more sleep than they really do.
That's what University of Chicago researcher Diane S. Lauderdale, PhD, and colleagues found when they strapped sensitive movement detectors to the wrists of 38- to 50-year-olds who volunteered for a long-term study of heart diseaseheart disease.
Based on the wristwatch-sized instruments -- and on detailed sleep logs kept by each study participant -- Lauderdale's team measured how long people slept, how long it took them to get to sleep, how much time they spent in bed, and how much of their time in bed they slept.
The Findings
Averaging 6 hours and 42 minutes a night, white women slept longest -- but not as long as the seven hours they claimed to sleep on weeknights. They also got to sleep fastest (in about 13 minutes), spent the most time in bed (nearly eight hours), and slept most efficiently (85.7% of their time in bed).
Black men slept least: only 5 hours and 6 minutes a night. That was even less than the six hours they said they got on weeknights. They also took longest to fall asleep (about 36 minutes), spent the least time in bed (about seven hours), and slept least efficiently (73.2% of their time in bed).
These gender and racial differences persisted even when the researchers took various factors, such as income and employment, into account. However, lower income was associated with taking longer to get to sleep and lower sleep efficiency.
"People who make more money may have fewer worries, or they may have more control over their sleep environment," Lauderdale says.
Lauderdale and colleagues report their findings in the July issue of the American Journal of Epidemiology. Accompanying the study is an editorial by sleep expert Stuart F. Quan, MD, of the University of Arizona.
Sleep Deprivation in Blacks?
Quan notes that the sleep time and sleep efficiency Lauderdale saw in black Americans would merit a diagnosis of sleep deprivation.
But, "caution should be exercised before accepting these values as normative for all middle-aged African-Americans and Caucasians," he warns.
Lauderdale and colleagues agree with Quan that the sleep levels they found cannot be considered normal for all black Americans. However, they say they are the first to include a significant number of black Americans in a sleep study.
"We also agree that persons in northern metropolitan areas might sleep less than other persons," they write. "However, there are a great many people in such settings."
Bottom line: "People don't get enough sleep, and they get less sleep than they think," Lauderdale says, in a news release.
thank goodness we only have one dog :)
the kids (aka the kittens) are tough enough to herd ;)
(rap sounds)
boom, shhgga, boom, shhgga shhgga, boom
Stayin' up all night
Drinkin' fo'ties wid my peeps
We too busy chillin'
Fo' mo****fu**ing sleep!
boom, shhgga, boom, shhgga shhgga, boom
LOLOLOL
That is too funny.
Lainey (my cat, see profile) sleeps on the pillow to the left side of my bed. Lights are usually out at or before 11:00 p.m. and she knows the routine.
Lights out=sleep time. Once I'm asleep it would take a big thunder storm "boom" to wake me up.
OTH, being a deep sleeper it takes me a while for my feet to hit the floor. I hit the snooze button at least twice.
I know what you mean. Sometimes I don't get fully awake until it's almost time to go to bed again.
Cute cat! Lainey looks very much like Cat 2, except he is darker.
Cat 1 often sleeps on my pillow. He's usually nice enough to leave the edge for my head.
I can't post more, I'm nodding off.
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