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Causes of Death by Level of Dependency at 6 Months After Ischemic Stroke in 3 Large Cohorts

Author(s): K. B. Slot, E. Berge, P. Sandercock, S. C. Lewis, P. Dorman, M. Dennis, Proje Oxfordshire Community Stroke, U. K. Int Stroke Trial

Background and Purpose-We assessed the influence of functional status at 6 months after ischemic stroke on cause of death during long-term follow-up in 3 prospective cohorts. Methods-The cohorts were 7710 patients from the Oxfordshire Community Stroke Project, Lothian Stroke Register, and International Stroke Trial. Functional status was assessed at 6 months after stroke onset. Causes of death were identified from death certificates, and were also classified into "stroke-related" or "other" causes. We calculated the relative risk with 95% CI to assess the association between dependency level and cause of death. We also performed a multivariable regression analysis to adjust for other relevant factors. Results-Six months after stroke onset 5961 (78%) patients were still alive. At the end of follow-up period, 1620 (47%) patients who were functionally dependent at 6 months after stroke onset had died vs 711 (28%) independent patients. Dependent patients had a relative risk of dying from stroke of 1.70 (95% CI, 1.44-2.00) compared to independent patients. Overall, dependent patients had a relative risk of 1.68 (95% CI, 1.49-1.91) of dying from stroke-related causes. Dependency remained significantly (P<0.01) associated with stroke-related causes of death in a multivariable regression analysis. Conclusion-Stroke-related deaths continue to be a problem during the years after an ischemic stroke, especially in patients who are functionally dependent at 6 months after onset. Better acute treatments to reduce dependency and adequate secondary prevention remain high priorities. (Stroke. 2009; 40: 1585-1589.)

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ISBN: 0039-2499
Publication Year: 2009
Periodical: Stroke
Periodical Number: 5
Volume: 40
Pages: 1585-1589
Author Address: