Preexisting cognitive impairment in intracerebral hemorrhage

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Cognitive deficits are increasingly recognized to pose a relevant consequence of stroke.1 However, cognitive deficits do not only result from stroke but are already present in 10%–15% of stroke patients before the event.3 The majority of studies on pre‐ and post‐stroke cognitive impairment are based on ischemic stroke or on mixed cohorts that included predominantly ischemic strokes and only few patients with hemorrhagic stroke.4 In the only prospective observational trial that determined the incidence of cognitive impairment and its course in patients with non‐traumatic intracerebral hemorrhage (ICH), prognostic factors for cognitive decline after ICH were preexisting cognitive impairment, severity of cortical atrophy on brain MRI, and previous stroke or transient ischemic attack (TIA).8
In this study, we examined the prevalence of cognitive impairment before ICH and explored factors associated with impaired cognition before the event.

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