this post was submitted on 13 Dec 2025
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They talk about correlation, not causation. And the data is from surveys, not actual measurements:

Researchers analyzed data from all 3,143 U.S. counties over six years, from 2019 to 2025, comparing how much sleep people reported getting with average life expectancy in each county. [Emphasis mine]

So saying that you sleep poorly is a predictive measure, but things that cause shorter life spans probably just screw up sleep (or at least ones perception of it) as well. Translating a correlation into individual advice is disingenuous at best.