WEDNESDAY, June 13 (HealthDay News) -- Race, ethnicity and
country of origin appear to be factors in how much sleep Americans
get each night, according to two new studies.
In one report, State University of New York researchers examined
data from 400,000 participants in the U.S. National Health
Interview Surveys between 2004 and 2010 and found that those born
in the United States were more likely to report sleeping longer
than the recommended seven to nine hours each night.
Previous research has found that adults who regularly sleep less
or more than the recommended seven to nine hours may be at
increased risk for health problems such as cardiovascular disease,
stroke and depression.
In comparison, African-born Americans were more likely to report
sleeping six hours or less per night, and Indian-born Americans
were more likely to report sleeping six to eight hours a night.
However, foreign-born Americans were less likely than U.S.-born
Americans to report getting too little or too much sleep after the
researchers adjusted for the effects of age, sex, education,
income, smoking, alcohol use, body mass index and emotional
In the other study, researchers randomly selected 439 adults in
Chicago and found that whites slept significantly longer than other
racial/ethnic groups, blacks reported the worst sleep quality, and
Asians were most likely to report daytime sleepiness.
"These racial/ethnic differences in sleep persisted even
following statistical adjustment for cardiovascular disease risk
factors that we already know to be associated with poor sleep, such
as body mass index, high blood pressure and diabetes," study lead
author Mercedes Carnethon, of Northwestern University Feinberg
School of Medicine in Chicago, said in an American Academy of Sleep
Medicine news release.
"And we excluded participants who had evidence of mild to
moderate sleep apnea. Consequently, these differences in sleep are
not attributable to underlying sleep disorders but represent the
sleep experience of a 'healthy' subset of the population," she
The studies were to be presented Wednesday at the annual meeting
of the Associated Professional Sleep Societies in Boston. Because
this study was presented at a medical meeting, the data and
conclusions should be viewed as preliminary until published in a
The U.S. National Heart, Lung, and Blood Institute offers
strategies for getting
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