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related 3.81 — strongly supporting 13 facts
Sleep duration and global cognition are linked by an inverted-U shaped association, where both baseline duration and significant changes in sleep duration (≥ 2 hours) correlate with global cognition scores as evidenced by [1], [2], and [3]. Furthermore, statistical models confirm that both short and long sleep durations at baseline are associated with lower global cognition scores, as detailed in [4] and [5].
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Improvement in sleep duration was associated with higher cognitive ... aging-us.com 13 facts
claimThe association between changes in sleep duration (≥ 2 hours) and lower global cognition scores was consistent across all three cognition tests used in the study models.
referenceThe study used generalized estimating equations (GEE) to analyze the associations between baseline sleep duration and longitudinal global cognition.
claimAmong participants who were moderate sleepers (6-8 hours) at baseline (Wave 1), increasing or decreasing sleep duration by 2 or more hours by Wave 2 was associated with lower global cognition scores compared to participants who did not change their sleep duration.
measurementIn a study of participants who slept 7 hours or more in Wave 1, higher sleep duration was associated with lower scores in global cognition (β=-0.47, P<0.001 for model 1; β=-0.28, P<0.001 for model 2) and on all three cognitive tests.
claimThe study identified an inverted-U-shaped association between baseline sleep duration and global cognition over 4 years among Chinese participants, affecting domains including episodic memory, figure drawing, and TICS, though baseline sleep duration did not increase rates of cognitive decline.
claimFor participants identified as short sleepers (sleeping <6 hours) in Wave 1, a change in sleep duration of 2 or more hours in Wave 2 or Wave 3 was associated with lower global cognition scores.
measurementA change in sleep duration of 2 or more hours between Wave 1 and Wave 2 is associated with a decline in global cognition scores equivalent to approximately 9 years of cognitive aging.
claimThe study titled 'Improvement in sleep duration was associated with higher cognitive...' identified an inverted-U shaped association between sleep duration and global cognition scores in Wave 1, as visualized by generalized additive models.
measurementThe sleep-duration-by-time interaction was not statistically significant (P > 0.10), indicating no significant association between sleep duration at Wave 1 and the rate of reduction in global cognition scores over a 4-year period.
referenceThe study used generalized additive models (GAM) to analyze the association between sleep duration and global cognition, which indicated a non-linear fit.
claimIn the study analysis of changes from Wave 1 to Wave 3, changes in sleep duration were associated with global cognition scores, with the association remaining significant for episodic memory and TICS tests in models 2 and 3, but not for the figure-drawing test.
measurementIn a study of participants who slept 7 hours or less in Wave 1, shorter sleep duration was associated with lower scores in global cognition (β=0.48, P<0.001 for model 1; β=0.28, P<0.001 for model 2) and on all three cognitive tests.
claimFor participants identified as long sleepers in Wave 1, changes in sleep duration had no significant effect on global cognition scores.