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Q Can a simple risk score predict stroke during the first 7 days after probable or definite transient ischaemic attack (TIA)?
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 hospital clinic with suspected TIA (clinic validation cohort).
Description of prediction guide:
analysis of predefined risk factors in the derivation cohort found that age ⩾60 years, clinical features, …
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