Human study · Supplements / medicine · 14 Oct 2026
In 9,476 Chinese adults ages 45 and older, sleeping under 6 hours lined up with higher odds of psychological frailty
Source: Aging & Mental Health
What the research found
Study (observational cohort). In 9,476 adults ages 45 and older in the China Health and Retirement Longitudinal Study, nighttime sleep reported in 2011 was compared with a psychological frailty index in 2018. Sleep under 6 hours lined up with higher odds than 6 to 8 hours (odds ratio 1.27, 95% CI 1.08 to 1.51). Persistent short sleep had an odds ratio of 1.44 (95% CI 1.15 to 1.81). The fitted curve bent near 7.6 hours of night sleep and 8.6 hours of total sleep. The authors say the link is not proof that changing sleep prevents frailty. This is not a reason to start a sleep drug or a supplement. Not medical advice.
Evidence level: Human study. A study in people, but an association isn't proof of cause.
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