• Lucy Chapman, Orla Kennedy, David Bradley, and Joseph Harbison.
• Mercer's Institute for Successful Ageing, St. James's Hospital, Dublin 8, Ireland. chapmale@tcd.ie.
• Ir J Med Sci. 2024 Jun 1; 193 (3): 147114781471-1478.

BackgroundIn-hospital stroke refers to a stroke arising in a patient during hospital admission for another condition. Between 2 and 17% of all inpatient strokes are in-hospital strokes.AimTo compare the outcomes and performance on quality-of-care stroke measures of in-hospital stroke cases with community-onset strokes.MethodsData collected for the Irish Annual Audit of Stroke from an Irish university teaching hospital was analysed for a 2-year period from 1st January 2020 to 31st December 2021. A retrospective cohort study was conducted to compare baseline characteristics, outcomes, and performance on standardised quality-of-care measures between the cohorts.ResultsThe rate of IHS was 15.6%. Median age was 73 years and 72 years for in-hospital and community-onset strokes respectively. Amongst in-hospital strokes, COVID-19 co-diagnosis (9.1% versus 1.3%; p = .0004), admission to intensive care (52.3% versus 5.3%; p < .0001), discharge to long term care (6.8% versus 2.3%; p = .04), mortality (12.5% versus 7.6%; p = .13), and modified Rankin score of two or more at discharge (58.0% versus 38.1%; p = .001), were more likely compared to community-onset strokes. Thrombolysis rates were lower (7.3% versus 12.0%; p = .22) and thrombectomy rates higher (9.8% versus 6.6;% p = .32), albeit non-significantly. Median time to thrombolysis was slower amongst in-hospital strokes (105 min versus 66 min; p = .03) and they were less likely to be admitted to the stroke unit (43.2% versus 78.5%; p < .0001).ConclusionsWhen compared with community-onset stroke, in-hospital stroke represents a distinct stroke subgroup with poorer outcomes and delays to thrombolysis emphasising the need for standardised approaches to evaluation and management.© 2023. The Author(s), under exclusive licence to Royal Academy of Medicine in Ireland.

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