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3 cohort studies: a derivation cohort (Oxfordshire Community Stroke Project [OCSP]) and 2 independent validation cohorts (2 cohorts from the Oxford Vascular Study [OXVASC] and a cohort of patients referred to a hospital based TIA clinic).
10 family practices in Oxfordshire, UK (OCSP and OXVASC cohorts) and a hospital based TIA clinic.
209 patients (mean age 70 y) with a first ever probable or definite TIA (OCSP derivation cohort); 190 patients (mean age 74 y) with probable or definite TIA and 378 patients (mean age 70 y) with suspected TIA (OXVASC validation cohorts); and 210 patients (mean age 65 y) referred to the …
For correspondence: Professor P M Rothwell, University of Oxford, Radcliff Infirmary, Oxford, UK.
Sources of funding: UK Stroke Association; BUPA Foundation; UK Medical Research Council.
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