PORTLAND, Ore., May 4 (UPI) — In China, 100-year-olds averaged 7.5 hours of sleep — including naps — daily and were more likely to report better sleep than those younger, researchers say.
The study, published in the journal Sleep, says a group of almost 2,800 adults age 100 or older from across China were 70 percent more likely to report good sleep than study participants ages 65-79.
Controlling for health conditions showed the participants age 100 years of age were less likely than the youngest study participants to sleep for 5 hours or fewer per day, but they were almost three times more likely to sleep for 10 hours or more.
The study also found those age 80 and older tended to sleep durations either shorter or longer than adults ages 65-79 — primarily due to health issues. Those with good healthcare were 84 percent more likely to report sleeping well, and those whose family was in good economic condition were 56 percent more likely to report good sleep quality.
“The majority of healthy elders could experience satisfactory sleep quality,” lead author Danan Gu of Portland State University in Oregon says in a statement.
Gu and colleagues looked at data from the 2005 section of the Chinese Longitudinal Healthy Longevity Survey — a sample composed of 15,638 adults age 65 and older.
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