The journals of gerontology. Series A, Biological sciences and medical sciences
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J. Gerontol. A Biol. Sci. Med. Sci. · Mar 2000
Sleep-wake patterns among postmenopausal women: a 24-hour unattended polysomnographic study.
Circadian sleep-wake profiles in postmenopausal women were examined to explore relationships between nocturnal and out-of-bed sleep. ⋯ Greater age was associated with more afternoon-evening sleep. Sleep was also frequently observed shortly after volunteers arose from bed in the morning.