Elizabeth Callaly1, Danielle Ni Chroinin2, Niamh Hannon2, Michael Marnane2, Layan Akijian2, Orla Sheehan2, Aine Merwick2, Derek Hayden2, Gillian Horgan2, Joseph Duggan2, Sean Murphy2, Killian O'Rourke2, Eamon Dolan2, David Williams2, Lorraine Kyne2, Peter J Kelly2. 1. From the Neurovascular Unit for Applied Research, Mater University Hospital, University College Dublin, Dublin, Ireland (E.C., D.N.C., N.H., M.M., L.A., O.S., A.M., D.H., G.H., J.D., S.M., K.O'R., L.K., P.J.K.); Departments of Geriatric and Stroke Medicine, Connolly Hospital, Dublin, Ireland (E.D.); Beaumont Hospital, Dublin, Ireland (D.W.); and Royal College of Surgeons, Dublin, Ireland (S.M., D.W.). ecallaly@rcsi.ie. 2. From the Neurovascular Unit for Applied Research, Mater University Hospital, University College Dublin, Dublin, Ireland (E.C., D.N.C., N.H., M.M., L.A., O.S., A.M., D.H., G.H., J.D., S.M., K.O'R., L.K., P.J.K.); Departments of Geriatric and Stroke Medicine, Connolly Hospital, Dublin, Ireland (E.D.); Beaumont Hospital, Dublin, Ireland (D.W.); and Royal College of Surgeons, Dublin, Ireland (S.M., D.W.).
Abstract
BACKGROUND AND PURPOSE: Few recent studies have investigated the rates and predictors of early and late stroke recurrence using prospective population-based methodology. We investigated recurrent stroke at 2 years in the North Dublin Population Stroke Study (NDPSS). METHODS: Patients were ascertained from December 2005 to 2006 from overlapping community and hospital sources using hot and cold pursuit. Stroke recurrence, survival, and functional outcome were ascertained at 72 hours, 7 days, 28 days, 90 days, 1 year, and 2 years. RESULTS: Of 567 patients, cumulative 2-year stroke recurrence rate was 10.8% and case fatality was 38.6%. Recurrence subtype was associated with initial stroke subtype (P<0.001). On multivariable Cox regression, hyperlipidemia (adjusted hazard ratio, 3.32; P=0.005) and prior stroke (adjusted hazard ratio, 2.92; P=0.01) were independent predictors of 2-year recurrence in 28-day survivors. CONCLUSIONS: Despite rigorous ascertainment, recurrent stroke rates were lower in current study than in earlier studies. Our data suggest that large sample sizes may be needed for future secondary prevention trials in patients treated with modern preventive medications.
BACKGROUND AND PURPOSE: Few recent studies have investigated the rates and predictors of early and late stroke recurrence using prospective population-based methodology. We investigated recurrent stroke at 2 years in the North Dublin Population Stroke Study (NDPSS). METHODS:Patients were ascertained from December 2005 to 2006 from overlapping community and hospital sources using hot and cold pursuit. Stroke recurrence, survival, and functional outcome were ascertained at 72 hours, 7 days, 28 days, 90 days, 1 year, and 2 years. RESULTS: Of 567 patients, cumulative 2-year stroke recurrence rate was 10.8% and case fatality was 38.6%. Recurrence subtype was associated with initial stroke subtype (P<0.001). On multivariable Cox regression, hyperlipidemia (adjusted hazard ratio, 3.32; P=0.005) and prior stroke (adjusted hazard ratio, 2.92; P=0.01) were independent predictors of 2-year recurrence in 28-day survivors. CONCLUSIONS: Despite rigorous ascertainment, recurrent stroke rates were lower in current study than in earlier studies. Our data suggest that large sample sizes may be needed for future secondary prevention trials in patients treated with modern preventive medications.
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