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Decreased neurovascular coupling to visual stimulation has been put forward as an early MRI marker for CAA disease severity. The current study investigates the role of neurovascular coupling in AD related dementia and its early stages. We included 25 subjective cognitive impairment, 33 mild cognitive impairment and 17 dementia patients and 44 controls. All participants underwent magnetic resonance imaging of the brain and neuropsychological assessment. Univariate general linear modeling analyses were used to assess neurovascular coupling between patient groups and controls. Moreover, linear regression analyses was used to assess the associations between neurovascular coupling and cognition. Our data show that BOLD amplitude is lower in dementia (mean 0.8\u2009\u00b1\u20090.2, p\u2009=\u20090.001) and MCI patients (mean 0.9\u2009\u00b1\u20090.3, p\u2009=\u20090.004) compared with controls (mean 1.1\u2009\u00b1\u20090.2). A low BOLD amplitude was associated with low scores in multiple cognitive domains. We conclude that cerebrovascular dysfunction, most likely due CAA, is an important comorbidity in early stages of dementia and has an independent effect on cognition.<\/jats:p>","DOI":"10.1177\/0271678x231214102","type":"journal-article","created":{"date-parts":[[2023,11,23]],"date-time":"2023-11-23T01:34:40Z","timestamp":1700703280000},"page":"1013-1023","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":15,"title":["Neurovascular coupling in early stage dementia \u2013 A case-control study"],"prefix":"10.1177","volume":"44","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-1957-1746","authenticated-orcid":false,"given":"Suzanne E","family":"van Dijk","sequence":"first","affiliation":[{"name":"Department of Radiology, Leiden University Medical Center, Leiden, The 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