Healthy sleep durations appear to vary across cultures.

Proc Natl Acad Sci U S A · 2025 · PMC12088396 · PMID 40327697

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only marginally significantno p-value reported

All of our conclusions hold for both operationalizations of sleep duration, with the exception that Typical Day’s sleep duration did not show a significant linear relation to the number of chronic conditions, and the inclusion of cultural fit yielded only marginally significant effects for depression and the number of chronic conditions.

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