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Journal SLEEP: disturbed sleep linked to poorer daytime function in older women
Date:10/1/2007

WESTCHESTER, Ill. One of the first large-scale studies to examine the association of sleep behaviors, neuromuscular performance and daytime function in a community dwelling of older women finds that poorer sleep is associated with worse physical function in older women during the daytime, according to a study published in the October 1 issue of the journal SLEEP.

The study, authored by Suzanne E. Goldman, PhD, of the University of Pittsburgh, was based on a total of 2,889 women, who participated in the 2002-2004 examination of the Study of Osteoporotic Fractures. The subjects wore actigraphs, which measured sleep variables including total sleep time and hours awake after sleep onset during the night and daytime napping behavior. Neuromuscular performance measurements included gait speed, chair stands and grip strength, while functional limitations were assessed as self-reported difficulty with one or more of six instrumental activities of daily living.

According to the results, women who slept less than six hours per night walked 3.5 percent slower than those who slept six to 6.8 hours. Those who slept greater than or equal to seven-and-a-half hours took 4.1 percent longer to complete five chair stands than those who slept 6.8 to seven-and-a-half hours. With higher wake after sleep onset, gait speed was 9.1 percent slower. It took 7.6 percent longer to complete five chair stands, and odds of functional limitation were 1.8 percent higher. Women with one to 1.8 hours of daytime sleep had higher odds of a functional limitation than those with less than 0.5 hours.

The results suggest that those women with more disrupted sleep as characterized by shorter sleep duration and longer wake time during the night, and those with greater daytime sleepiness as characterized by napping behavior, were at greater risk for poorer neuromuscular performance and poorer daytime function, said Dr. Goldman. Women with objective measures of poor sleep
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Contact: Jim Arcuri
jarcuri@aasmnet.org
708-492-0930
American Academy of Sleep Medicine
Source:Eurekalert

Page: 1 2 3

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