Irregular Sleep and Later Cognitive Decline
Does going to bed at wildly different times predict memory decline years later? A large cohort says yes, but the story is tangled.
In one paragraph
A cohort of 18,400 adults wore sleep trackers for two weeks and was followed for nine years. People with the least regular sleep timing had a higher chance of being diagnosed with mild cognitive impairment. The link survived adjustment for sleep duration but cannot prove cause. This episode covers the design, the numbers and the reverse causation problem.
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