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ABCD2 risk score does not predict the presence of cerebral microemboli in patients with hyper-acute symptomatic critical carotid artery stenosis ABCD2 risk score and cerebral microemboli detected by transcranial Doppler (TCD) have been separately shown to the predict risk of recurrent acute stroke. We studied whether ABCD2 risk score predicts cerebral microemboli in patients with hyper-acute symptomatic carotid artery stenosis.We studied 206 patients presenting within 2 weeks of transient (...) with hyper-acute symptomatic critical carotid stenosis had an ABCD2 risk score ≥4. There was no significant difference in the NICE red flag criterion for early assessment (ABCD2 risk score ≥4) for patients with cerebral microemboli versus those without microemboli (59/86 vs 81/120 patients: OR 1.05 ABCD2 risk score ≥4 (95% CI 0.58 to 1.90, p=0.867)). The ABCD2 risk score was <4 in 27 of 86 (31%: 95% CI 21 to 41) embolising patients and in 39 of 120 (31%: 95% CI 23 to 39) without cerebral microemboli
The ABCD2scoring system for transient ischemic attacks: a review of the diagnostic accuracy and predictive value The ABCD2scoring system for transient ischemic attacks: a review of the diagnostic accuracy and predictive value The ABCD2scoring system for transient ischemic attacks: a review of the diagnostic accuracy and predictive value CADTH Record Status This is a bibliographic record of a published health technology assessment from a member of INAHTA. No evaluation of the quality (...) of this assessment has been made for the HTA database. Citation CADTH. The ABCD2scoring system for transient ischemic attacks: a review of the diagnostic accuracy and predictive value. Ottawa: Canadian Agency for Drugs and Technologies in Health (CADTH). Rapid Response - Summary with Critical Appraisal. 2014 Authors' conclusions Evidence from systematic reviews suggests there is some predictive value to ABCD2scoring, but results are dependent on setting and method of scoring, with ABCD2 performing more poorly
ABCD3 and ABCD3-I scores are superior to ABCD2score in the prediction of short- and long-term risks of stroke after transient ischemic attack Several risk scores have been developed to predict the stroke risk after transient ischemic attack (TIA). However, the validation of these scores in different cohorts is still limited. The objective of this study was to elucidate whether these scores were able to predict short-term and long-term risks of stroke in patients with TIA.From the Fukuoka (...) abnormal diffusion-weighted image was not. ABCD3 (C-statistics 0.61) and ABCD3-I (C-statistics 0.66) scores improved the short-term predictive ability for stroke (at 7 days) compared with the ABCD2score (C-statistics 0.54). Addition of intracranial arterial stenosis (at 3 years, continuous net reclassification improvement 30.5%; P<0.01) and exclusion of abnormal diffusion-weighted imaging (at 3 years, continuous net reclassification improvement 24.0%; P<0.05) further improved the predictive ability
Incidence of transient ischemic attack and early stroke risk: validation of the ABCD2score in an Italian population-based study The importance of transient ischemic attack (TIA) lies on the short-term risk of stroke, and the ABCD2score may improve early stroke risk prediction. However, population-based studies are still needed. We aimed to provide data on TIA incidence and to evaluate the ABCD2 predictive ability for early recurrent stroke in a population-based study.This study is part of a 2 (...) % CI, 0.31-0.65) when standardized to the 2007 Italian population and 0.25 (95% CI, 0.16-0.39) when standardized to the European standard population. Estimates of stroke risk after the index TIA within 2, 7, 30, and 90 days were, respectively, 2.5% (95% CI, 0.7-6.2), 5.6% (95% CI, 2.6-10.3), 6.2% (95% CI, 3.0-11.1), and 11.2% (95% CI, 6.8-17.1). ABCD2score was strongly associated with stroke occurrence after index TIA: the areas under the receiver operating characteristic curve at 2, 7, 30, and 90
Early stroke risk and ABCD2score performance in tissue- vs time-defined TIA: a multicenter study Stroke risk immediately after TIA defined by time-based criteria is high, and prognostic scores (ABCD2 and ABCD3-I) have been developed to assist management. The American Stroke Association has proposed changing the criteria for the distinction between TIA and stroke from time-based to tissue-based. Research using these definitions is lacking. In a multicenter observational cohort study, we have (...) investigated prognosis and performance of the ABCD2score in TIA, subcategorized as tissue-positive or tissue-negative on diffusion-weighted imaging (DWI) or CT imaging according to the newly proposed criteria.Twelve centers provided data on ABCD2scores, DWI or CT brain imaging, and follow-up in cohorts of patients with TIA diagnosed by time-based criteria. Stroke rates at 7 and 90 days were studied in relation to tissue-positive or tissue-negative subcategorization, according to the presence or absence
Prospective validation of the ABCD2score for patients in the emergency department with transient ischemic attack The ABCD2score (Age, Blood pressure, Clinical features, Duration of symptoms and Diabetes) is used to identify patients having a transient ischemic attack who are at high risk for imminent stroke. However, despite its widespread implementation, the ABCD2score has not yet been prospectively validated. We assessed the accuracy of the ABCD2score for predicting stroke at 7 (primary (...) outcome) and 90 days.This prospective cohort study enrolled adults from eight Canadian emergency departments who had received a diagnosis of transient ischemic attack. Physicians completed data forms with the ABCD2score before disposition. The outcome criterion, stroke, was established by a treating neurologist or by an Adjudication Committee. We calculated the sensitivity and specificity for predicting stroke 7 and 90 days after visiting the emergency department using the original "high-risk
An assessment of the incremental value of the ABCD2score in the emergency department evaluation of transient ischemic attack We study the incremental value of the ABCD2score in predicting short-term risk of ischemic stroke after thorough emergency department (ED) evaluation of transient ischemic attack.This was a prospective observational study of consecutive patients presenting to the ED with a transient ischemic attack. Patients underwent a full ED evaluation, including central nervous (...) system and carotid artery imaging, after which ABCD2scores and risk category were assigned. We evaluated correlations between risk categories and occurrence of subsequent ischemic stroke at 7 and 90 days.The cohort consisted of 637 patients (47% women; mean age 73 years; SD 13 years). There were 15 strokes within 90 days after the index transient ischemic attack. At 7 days, the rate of stroke according to ABCD2 category in our cohort was 1.1% in the low-risk group, 0.3% in the intermediate-risk
Addition of brain infarction to the ABCD2Score (ABCD2I): a collaborative analysis of unpublished data on 4574 patients The ABCD system was developed to predict early stroke risk after transient ischemic attack. Incorporation of brain imaging findings has been suggested, but reports have used inconsistent methods and been underpowered. We therefore performed an international, multicenter collaborative study of the prognostic performance of the ABCD(2) score and brain infarction on imaging (...) to determine the optimal weighting of infarction in the score (ABCD(2)I).Twelve centers provided unpublished data on ABCD(2) scores, presence of brain infarction on either diffusion-weighted imaging or CT, and follow-up in cohorts of patients with transient ischemic attack diagnosed by World Health Organization criteria. Optimal weighting of infarction in the ABCD(2)I score was determined using area under the receiver operating characteristic curve analyses and random effects meta-analysis.Among 4574
Population-based study of ABCD2score, carotid stenosis, and atrial fibrillation for early stroke prediction after transient ischemic attack: the North Dublin TIA study Transient ischemic attack (TIA) etiologic data and the ABCD(2) score may improve early stroke risk prediction, but studies are required in population-based cohorts. We investigated the external validity of the ABCD(2) score, carotid stenosis, and atrial fibrillation for prediction of early recurrent stroke after TIA.Patients (...) , 9.7% to 29.7%) with severe stenosis/occlusion (hazard ratio=3.3; 95% CI, 1.5 to 7.4, P=0.002). In confirmed TIA cases (n=443), the ABCD(2) score performed no better than chance for prediction of 90-day stroke (c-statistic=0.55; 95% CI, 0.45 to 0.64), largely related to the 24.2% (8/33) of patients who experienced a recurrence and had low ABCD(2) scores (0-3). However, in nonspecialist-suspected TIA cases (n=700), the predictive utility improved for stroke at 28 (c-statistic=0.61; 95% CI, 0.50
ABCD2score predicts severity rather than risk of early recurrent events after transient ischemic attack The ABCD(2) score predicts the early risk of stroke after transient ischemic attack (TIA). However, data on the severity of recurrent events would also be useful. Do patients with high scores also have more severe early recurrent strokes, perhaps further justifying hospital admission? Do patients with low scores have a low early risk of recurrent TIA as well as recurrent stroke?We completed (...) a prospective, population-based study in Oxfordshire, England, of 500 consecutive patients presenting with TIA from April 1, 2002, by using multiple methods of case ascertainment (Oxford Vascular Study). Recurrent TIA, minor stroke, and major stroke (National Institutes of Health Stroke Scale score >3 at the time of first assessment) were identified by face-to-face follow-up. Predictive value was expressed as the area under the receiver operating characteristic curve.Of 500 patients with TIA, 55 had
Multicenter external validation of the ABCD2score in triaging TIA patients A simple clinical score (ABCD(2) score) has been introduced to triage TIA patients with a high early risk of stroke. External validation studies have yielded inconsistent results regarding the predictive ability of the ABCD(2) score. We aimed to prospectively validate the former score in a multicenter case series study.We prospectively calculated the ABCD(2) score (age [> or = 60 years: 1 point]; blood pressure (...) % CI 10%-22%). The ABCD(2) score accurately discriminated between TIA patients with high 7-day (c statistic 0.72, 95% CI 0.57-0.88) and 90-day (c statistic 0.75, 95% CI 0.65-0.86) risks of stroke. The 90-day risk of stroke was 7-fold higher in patients with an ABCD(2) score >3 points (28%, 95% CI 18%-38%) than in patients with an ABCD(2) score < or = 3 points (4%, 95% CI 0%-9%). After adjustment for stroke risk factors, race, history of previous TIA, medication use before the index TIA
A multicenter evaluation of the ABCD2score`s accuracy for predicting early ischemic stroke in admitted patients with transient ischemic attack We evaluate, in admitted patients with transient ischemic attack, the accuracy of the ABCD(2) (age [A], blood pressure [B], clinical features [weakness/speech disturbance] [C], transient ischemic attack duration [D], and diabetes history [D]) score in predicting ischemic stroke within 7 days.At 16 North Carolina hospitals, we enrolled a prospective (...) , nonconsecutive sample of admitted patients with transient ischemic attack and with no stroke history, presenting within 24 hours of transient ischemic attack symptom onset. We conducted a medical record review to determine ischemic stroke outcomes within 7 days. According to a modified Rankin Scale Score, strokes were classified as disabling (>2) or nondisabling (< or =2).During a 35-month period, we enrolled 1,667 patients, of whom 373 (23%) received a diagnosis of an ischemic stroke within 7 days. Eighteen
Early diffusion weighted MRI as a negative predictor for disabling stroke after ABCD2score risk categorization in transient ischemic attack patients The prognostic value early diffusion-weighted magnetic resonance imaging (DWMRI) adds in the setting of transient ischemic attack (TIA), after risk stratification by a clinical score, is unclear. The purpose of this study is to evaluate, after ABCD2score risk categorization in admitted TIA patients, whether negative DWMRI performed within 24 (...) hours of symptom onset improves on the identification of patients at low risk for experiencing a disabling stroke within 90 days.At 15 North Carolina hospitals, we enrolled a prospective nonconsecutive sample of admitted TIA patients. We excluded patients not undergoing a DWMRI within 24 hours of admission and patients for whom a dichotomized (< or = or >3) ABCD2score could not be calculated. We conducted a medical record review to determine disabling ischemic stroke outcomes within 90 days.Over 35
Does ABCD2score below 4 allow more time to evaluate patients with a transient ischemic attack? The National Institute for Clinical Excellence (NICE) recommends that patients with a transient ischemic attack and ABCD(2) score > or =4 and those with >2 transient ischemic attacks within 1 week be admitted for urgent complete etiologic evaluation within 24 hours and that those with an ABCD(2) score <4 be evaluated less urgently within 1 week.Using data from 1176 patients with a definite (...) or possible transient ischemic attack or minor stroke included in the SOS-TIA registry (January 2003 to June 2007), we studied the usefulness of the conventional ABCD(2) score cutoff as well as the NICE criteria for urgent admission to a stroke unit defined as presence of symptomatic internal carotid artery stenosis > or =50%, symptomatic intracranial artery stenosis > or =50%, or major cardiac source of embolism.Among 697 patients with an ABCD(2) score <4, 20% required immediate consideration
Validation and refinement of the ABCD2score: a population-based analysis Transient ischemic attacks are a frequent diagnosis in the emergency department setting, yet expert opinion as to the proper follow-up and need for hospitalization differs widely. Recently, an effort has been made to risk-stratify patients presenting with transient ischemic attacks through scoring systems such as the ABCD and ABCD2 scales. The aim of our study was to independently validate these scores using a population (...) -based cohort.Using the data from the Rochester Stroke and Transient Ischemic Attack Registry and resources of the Rochester Epidemiology Project, medical records of all residents of Rochester, Minn, with a diagnosis of incident transient ischemic attack from 1985 through 1994 were examined (N=284). Patients were scored on the ABCD and ABCD2 scales and new scores were created by adding hyperglycemia and a history of hypertension. The end points of stroke and death were collected previously and were