Good Sleepers Have Better Quality of Life and Less Depression
to nine hours of sleep per night is associated with higher ratings for
quality of life and lower ratings for depression, suggests a research
abstract presented at Sleep 2011, the 25th Anniversary Meeting of
the Associated Professional Sleep Societies LLC (APSS).
that people with a "normal" sleep duration of six to nine hours per
night had higher self-reported scores for quality of life and lower
scores for depression severity compared to short and long sleepers.
These differences were statistically significant in all comparisons.
Among patients who reported having perfect health, there were a higher
percentage of normal sleepers, who also had significantly lower scores
for depression severity compared to short and long sleepers with
results are important because they provide more information about the
importance of getting enough sleep, which is usually six to nine hours
per night," said principal investigator Dr. Charles Bae, neurologist at
the Cleveland Clinic Sleep Disorders Center in Ohio. "People may
already expect that their quality of life could be decreased when they
do not get enough sleep, but they may not realize that sleeping too
much can also have a negative impact."
colleagues analyzed data from 10,654 patient records, which were
collected from January 2008 to May 2010. Study subjects had a mean age
of about 52 years. Quality of life was assessed using the EQ-5D
questionnaire, a standardized measure of health outcome. Thenine-item
Patient Health Questionnaire was used as a screening tool for
depression. Generalized estimating equations were used to account for
multiple visits per patient, and a multi-variable logistic regression
model adjusted for demographic differences such as age, gender, race
and marital status. Short sleep was defined as less than six hours per
night, and long sleep was classified as more than nine hours per night.
surprising to see that sleeping less than six hours and more than nine
hours is associated with a similar decrease in quality of life and
increase in depressive symptoms," said Bae. "I thought that there would
be changes in quality of life and degree of depressive symptoms for
short and long sleepers, but did not expect that those changes would be
similar in both groups."
Academy of Sleep Medicine reports that individual sleep needs vary.
However, most adults need about seven to eight hours of nightly sleep
to feel alert and well rested during the day.
For more information on the American Academy of Sleep Medicine, visit www.aasmnet.org.