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the claim

Chronic insomnia increases the risk of developing dementia later in life.

the verdict
INSUFFICIENT LEANING
Recorded sources
5 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that chronic insomnia increases the risk of developing dementia later in life?

Unclear. The retrieved items offer only partial support: a small 3-year Parkinson's cohort found insomnia predicted dementia, a meta-analysis on insomnia and dementia risk is present but its pooled result is not shown, and a narrative review lists sleep disturbances among dementia risk factors. No item settles the general claim that chronic insomnia raises later-life dementia risk.

Verdict: PARTIAL LEAN · 5 sources for, 0 against · Last checked

The private library was unavailable for some searches in this check. Missing library results are not evidence against the claim.

Evidence for · 5
Insomnia and autonomic dysfunction may identify patients at risk for developing early Parkinson's disease dementia
2019
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Jurcau, A. & Nunkoo, V. S. (2019). Insomnia and autonomic dysfunction may identify patients at risk for developing early Parkinson's disease dementia. doi.org. https://doi.org/10.21203/rs.2.441/v1

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More for · 4
Insomnia and risk of all-cause dementia: A systematic review and meta-analysis
2025
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Meng, M., Shen, X., Xie, Y., Lan, R., & Zhu, S. (2025). Insomnia and risk of all-cause dementia: A systematic review and meta-analysis. doi.org. https://doi.org/10.1371/journal.pone.0318814

From Anxiety, Depression to Major Neurocognitive Disorders: Exploring Their Association With the Risk Factors for Dementia.
2026
Get citation
AA, S. & N, A. Z. (2026). From Anxiety, Depression to Major Neurocognitive Disorders: Exploring Their Association With the Risk Factors for Dementia.. doi.org. https://doi.org/10.7759/cureus.101994

Association Between Z Drugs Use and Risk of Cognitive Impairment in Middle-Aged and Older Patients With Chronic Insomnia
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Association Between Z Drugs Use and Risk of Cognitive Impairment in Middle-Aged and Older Patients With Chronic Insomnia. (n.d.). cir.nii.ac.jp. https://doi.org/10.3389/fnhum.2021.775144

Overcoming insomnia: a cognitive-behavioral therapy approach : therapist guide
2015
Get citation
Overcoming insomnia: a cognitive-behavioral therapy approach : therapist guide. (2015). search.ebscohost.com. https://search.ebscohost.com/login.aspx?direct=true&scope=site&db=nlebk&db=nlabk&AN=842832

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