Stroke Risk After Transient Ischemic Attack in a Population-Based Setting

Lisabeth, Lynda D.; Ireland, Jennifer K.; Risser, Jan M. H.; Brown, Devin L.; Smith, Melinda A.; Garcia, Nelda; Morgenstern, Lewis B.

doi:10.1161/01.str.0000134416.89389.9d

Cited by 141 publications

(99 citation statements)

References 17 publications

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“…The ascertainment of stroke events after TIA was carried out by face-to-face patient assessment or telephone interviews in 25 studies, 9,21,24,61,69,81,119,122,128,[132][133][134][137][138][139]144,[149][150][151][152]155,156,161,164,165 by medical records in 15 studies, 23,62,87,120,126,127,129,130,130,135,136,140,143,145,157,159 by mixed methods involving face-to-face assessment plus another method (i.e. telephone interviews, medical records, letters) in 11 studies, 65,131,[146][147][148]153,154,158,…”

Section: Characteristics Of Included Studiesmentioning

confidence: 99%

An assessment of the cost-effectiveness of magnetic resonance, including diffusion-weighted imaging, in patients with transient ischaemic attack and minor stroke: a systematic review, meta-analysis and economic evaluation

Wardlaw

Brazzelli

Miranda

et al. 2014

Health Technol Assess

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BackgroundPatients with transient ischaemic attack (TIA) or minor stroke need rapid treatment of risk factors to prevent recurrent stroke. ABCD2 score or magnetic resonance diffusion-weighted brain imaging (MR DWI) may help assessment and treatment.ObjectivesIs MR with DWI cost-effective in stroke prevention compared with computed tomography (CT) brain scanning in all patients, in specific subgroups or as ‘one-stop’ brain-carotid imaging? What is the current UK availability of services for stroke prevention?Data sourcesPublished literature; stroke registries, audit and randomised clinical trials; national databases; survey of UK clinical and imaging services for stroke; expert opinion.Review methodsSystematic reviews and meta-analyses of published/unpublished data. Decision-analytic model of stroke prevention including on a 20-year time horizon including nine representative imaging scenarios.ResultsThe pooled recurrent stroke rate after TIA (53 studies, 30,558 patients) is 5.2% [95% confidence interval (CI) 3.9% to 5.9%] by 7 days, and 6.7% (5.2% to 8.7%) at 90 days. ABCD2 score does not identify patients with key stroke causes or identify mimics: 66% of specialist-diagnosed true TIAs and 35–41% of mimics had an ABCD2 score of ≥ 4; 20% of true TIAs with ABCD2 score of < 4 had key risk factors. MR DWI (45 studies, 9078 patients) showed an acute ischaemic lesion in 34.3% (95% CI 30.5% to 38.4%) of TIA, 69% of minor stroke patients, i.e. two-thirds of TIA patients are DWI negative. TIA mimics (16 studies, 14,542 patients) make up 40–45% of patients attending clinics. UK survey (45% response) showed most secondary prevention started prior to clinic, 85% of primary brain imaging was same-day CT; 51–54% of patients had MR, mostly additional to CT, on average 1 week later; 55% omitted blood-sensitive MR sequences. Compared with ‘CT scan all patients’ MR was more expensive and no more cost-effective, except for patients presenting at > 1 week after symptoms to diagnose haemorrhage; strategies that triaged patients with low ABCD2 scores for slow investigation or treated DWI-negative patients as non-TIA/minor stroke prevented fewer strokes and increased costs. ‘One-stop’ CT/MR angiographic-plus-brain imaging was not cost-effective.LimitationsData on sensitivity/specificity of MR in TIA/minor stroke, stroke costs, prognosis of TIA mimics and accuracy of ABCD2 score by non-specialists are sparse or absent; all analysis had substantial heterogeneity.ConclusionsMagnetic resonance with DWI is not cost-effective for secondary stroke prevention. MR was most helpful in patients presenting at > 1 week after symptoms if blood-sensitive sequences were used. ABCD2 score is unlikely to facilitate patient triage by non-stroke specialists. Rapid specialist assessment, CT brain scanning and identification of serious underlying stroke causes is the most cost-effective stroke prevention strategy.FundingThe National Institute for Health Research Health Technology Assessment programme.

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Section: Characteristics Of Included Studiesmentioning

confidence: 99%

An assessment of the cost-effectiveness of magnetic resonance, including diffusion-weighted imaging, in patients with transient ischaemic attack and minor stroke: a systematic review, meta-analysis and economic evaluation

Wardlaw

Brazzelli

Miranda

et al. 2014

Health Technol Assess

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show abstract

“…[99][100][101][102][103][104][105][106] In patients with ischemia in the territory of a stenotic carotid artery, CEA within the first 2 weeks reduces the risk of stroke, 35,93 but the benefit of surgery diminishes with time after the initial event. 107 Transient monocular blindness (amaurosis fugax) is caused by temporary reduction of blood flow to an eye.…”

Section: Clinical Assessment Of Patients With Focal Cerebral Ischemicmentioning

confidence: 99%

2011 ASA/ACCF/AHA/AANN/AANS/ACR/ASNR/CNS/SAIP/SCAI/SIR/SNIS/SVM/SVS Guideline on the Management of Patients With Extracranial Carotid and Vertebral Artery Disease: Executive summary

Brott

Halperin

Abbara

et al. 2011

Cathet Cardio Intervent

184

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“…1,2 Therefore, early diagnosis and prompt treatment are required to prevent subsequent stroke in patients presenting with TIA. 3,4 To predict early occurrence of stroke after TIA, several risk scores have been developed and widely used in clinical practice.…”

mentioning

confidence: 99%

ABCD3 and ABCD3-I Scores Are Superior to ABCD2 Score in the Prediction of Short- and Long-Term Risks of Stroke After Transient Ischemic Attack

Kiyohara

Kamouchi

Kumai

et al. 2014

Stroke

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Background and Purpose-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. Methods-From the Fukuoka Stroke Registry, 693 patients with TIA were followed up for 3 years. Multivariable-adjusted Cox proportional hazards model was used to assess the hazard ratio of risk factors for stroke. The discriminatory ability of each risk score for incident stroke was estimated by using C-statistics and continuous net reclassification improvement. Results-The multivariable-adjusted Cox proportional hazards model revealed that dual TIA and carotid stenosis were both significant predictors for stroke after TIA, whereas 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 ABCD2 score (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 for stroke risk until 3 years after TIA. Conclusions-The present study demonstrates that ABCD3 and ABCD3-I scores are superior to the ABCD2 score for the prediction of subsequent stroke in patients with TIA. Addition of neuroimaging in the ABCD3 score may enable prediction of long-term stroke risk after TIA. (Stroke. 2014;45:418-425.)Key Words: ABCD2 score ◼ prognosis ◼ stroke ◼ transient ischemic attack

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Stroke Risk After Transient Ischemic Attack in a Population-Based Setting

Cited by 141 publications

References 17 publications

An assessment of the cost-effectiveness of magnetic resonance, including diffusion-weighted imaging, in patients with transient ischaemic attack and minor stroke: a systematic review, meta-analysis and economic evaluation

An assessment of the cost-effectiveness of magnetic resonance, including diffusion-weighted imaging, in patients with transient ischaemic attack and minor stroke: a systematic review, meta-analysis and economic evaluation

2011 ASA/ACCF/AHA/AANN/AANS/ACR/ASNR/CNS/SAIP/SCAI/SIR/SNIS/SVM/SVS Guideline on the Management of Patients With Extracranial Carotid and Vertebral Artery Disease: Executive summary

ABCD3 and ABCD3-I Scores Are Superior to ABCD2 Score in the Prediction of Short- and Long-Term Risks of Stroke After Transient Ischemic Attack

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