(NewsNation) — Those tossing and turning throughout their early midlife years may be more susceptible to dementia as they age, researchers found.

The new study, published Wednesday in the journal Neurology, analyzed 589 people's brain scans for a connection between sleep quality in people in their 40s and their brain age later in life.

Researchers found a "dose-response relationship" between the two factors, with those who reported more poor sleep characteristics at 40 showing........

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