Cohort2024 · Sleep · Windred DP et al.
Sleep regularity predicts mortality better than sleep duration
Who, how long
60,977 UK Biobank participants with wrist actigraphy, 7.8 years
What they found
The most irregular fifth of sleepers had 48% higher mortality than the most regular — independent of sleep duration.
⚠ Caveat
One week of measurement stands in for the whole sleep pattern; shift work and illness may confound.
Related in the knowledge base
Last reviewed: 6 September 2026
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