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Sleep doesn't evade older adults because of aging alone, researchers affirmed in a population-based, Chinese study with the largest-ever cohort of the very elderly.
Factoring in health and other variables, centenarians in China were 70% more likely to report good quality sleep than younger seniors ages 65 to 79 (P<0.001), according to Danan Gu, PhD, of Portland State University in Portland, Ore., and colleagues.
All other factors being equal, good sleep quality was 19% more common among respondents in their 80s and 38% more likely among those in their 90s, compared with those from ages 65 to 79 (P<0.01 and P<0.001, respectively).
"These findings may support the argument that sleep problems at old and oldest-old ages likely arise from a variety of physiological and psychosocial factors rather than aging per se," Gu's group wrote in the May 1 issue of SLEEP.
Another possibility is that people change their perception of "acceptable" sleep with advancing age, they suggested.
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