External Validation of the ASTRAL and DRAGON Scores for Prediction of Functional Outcome in Stroke
Por:
Cooray, C, Mazya, M, Bottai, M, Dorado, L, Skoda, O, Toni, D, Ford, GA, Wahlgren, N and Ahmed, N
Publicada:
1 jun 2016
Resumen:
Background and Purpose-ASTRAL (Acute Stroke Registry and Analysis of Lausanne) and DRAGON (includes dense middle cerebral artery sign, prestroke modified Rankin Scale score, age, glucose, onset to treatment, National Institutes of Health Stroke Scale score) are 2 recently developed scores for predicting functional outcome after acute stroke in unselected acute ischemic stroke patients and in patients treated with intravenous thrombolysis, respectively. We aimed to perform external validation of these scores to assess their predictive performance in the large multicentre Safe Implementation of Thrombolysis in Stroke-International Stroke Thrombolysis Register.
Methods-We calculated the ASTRAL and DRAGON scores in 36 131 and 33 716 patients, respectively, registered in Safe Implementation of Thrombolysis in Stroke-International Stroke Thrombolysis Register between 2003 and 2013. The proportion of patients with 3-month modified Rankin Scale scores of 3 to 6 was observed for each score point and compared with the predicted proportion according to the risk scores. Calibration was assessed using calibration plots, and predictive performance was assessed using area under the curve of the receiver operating characteristic. Multivariate logistic regression coefficients for the variables in the 2 scores were compared with the original derivation cohorts.
Results-The ASTRAL showed an area under the curve of 0.790 (95% confidence interval, 0.786-0.795) and the DRAGON an area under the curve of 0.774 (95% confidence interval, 0.769-0.779). All ASTRAL parameters except range of visual fields and all DRAGON parameters were significantly associated with functional outcome in multivariate analysis.
Conclusions-The ASTRAL and DRAGON scores show an acceptable predictive performance. ASTRAL does not require imaging-data and therefore may have an advantage for the use in prehospital patient assessment. Prospective studies of both scores evaluating the impact of their use on patient outcomes after intravenous thrombolysis and endovascular therapy are needed.
Filiaciones:
Cooray, C:
Karolinska Univ Hosp, Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
Karolinska Univ Hosp, Dept Neurol, Stockholm, Sweden
Mazya, M:
Karolinska Univ Hosp, Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
Karolinska Univ Hosp, Dept Neurol, Stockholm, Sweden
Bottai, M:
Karolinska Inst, Inst Environm Med, Unit Biostat, S-10401 Stockholm, Sweden
:
Univ Autonoma Barcelona, Hosp Univ Germans Trias & Pujol, Dept Neurosci, Stroke Unit, E-08193 Barcelona, Spain
Skoda, O:
Charles Univ Prague, Univ Hosp Kralovske Vinohrady, Fac Med 3, Dept Neurol, Prague, Czech Republic
Reg Hosp, Dept Neurol, Stroke Unit, Jihlava, Czech Republic
Toni, D:
Univ Roma La Sapienza, Dept Neurol & Psychiat, Hosp Policlin Umberto 1, Emergency Dept,Stroke Unit, Piazzale Aldo Moro 5, I-00185 Rome, Italy
Ford, GA:
Newcastle Univ, Stroke Res Grp, Inst Ageing & Hlth, Dept Med, Newcastle Upon Tyne NE1 7RU, Tyne & Wear, England
Wahlgren, N:
Karolinska Univ Hosp, Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
Karolinska Univ Hosp, Dept Neurol, Stockholm, Sweden
Ahmed, N:
Karolinska Univ Hosp, Karolinska Inst, Dept Clin Neurosci, Stockholm, Sweden
Karolinska Univ Hosp, Dept Neurol, Stockholm, Sweden
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