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Optimized Management of Endovascular Treatment for Acute Ischemic Stroke
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A simple score (ABCD) to identify individuals at high early risk of stroke after transient ischaemic attack

P M Rothwell1, M F Giles, E Flossmann

  • 1Department of Clinical Neurology, University of Oxford, Radcliffe Infirmary, Oxford, OX2 6HE, UK. peter.rothwell@clneuro.ox.ac.uk

Lancet (London, England)
|July 5, 2005
PubMed

Insights

Predicting stroke risk after transient ischemic attack (TIA) is crucial. The ABCD score effectively identifies high-risk individuals needing urgent care, improving TIA management.

Area of Science:

  • Neurology
  • Clinical Medicine
  • Epidemiology

Background:

  • Effective early management of transient ischemic attacks (TIA) is hindered by the inability to predict which patients face the highest early stroke risk.
  • Accurate risk stratification is essential for timely intervention and improved patient outcomes in TIA cases.

Purpose of the Study:

  • To derive and validate a predictive score for 7-day stroke risk in patients with TIA.
  • To assess the clinical utility of the ABCD score in stratifying patients for front-line health services and TIA clinics.

Main Methods:

  • A six-point ABCD score was derived from the Oxfordshire Community Stroke Project (OCSP) cohort (n=209).
  • The score was validated in the Oxford Vascular Study (OXVASC) cohort (n=190) and applied to suspected TIA referrals (n=378) and a TIA clinic cohort (n=210).
  • Outcomes assessed included 7-day stroke risk and risk of stroke before appointment.

Main Results:

  • The ABCD score demonstrated high predictive accuracy for 7-day stroke risk across all studied cohorts (p<0.0001).
  • In the OXVASC suspected TIA cohort, 95% of strokes occurred in 27% of patients with a score of 5 or greater.
  • Patients with ABCD scores of 5 and 6 faced significantly higher 7-day stroke risks (12.1% and 31.4%, respectively) compared to those with scores <5 (0.4%).
  • In the TIA clinic cohort, all patients experiencing stroke before their appointment had an ABCD score of 4 or greater.

Conclusions:

  • The 7-day risk of stroke following TIA is highly predictable using the ABCD score.
  • The ABCD score is a valuable tool for routine clinical practice, enabling identification of high-risk individuals requiring immediate investigation and treatment.
  • Further validation and refinement of the ABCD score are recommended for broader clinical application.
Abstract

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