RT Journal Article SR Electronic T1 Predictors of poor outcome despite recanalization: a multiple regression analysis of the NASA registry JF Journal of NeuroInterventional Surgery JO J NeuroIntervent Surg FD BMJ Publishing Group Ltd. SP 224 OP 229 DO 10.1136/neurintsurg-2014-011525 VO 8 IS 3 A1 Italo Linfante A1 Amy K Starosciak A1 Gail R Walker A1 Guilherme Dabus A1 Alicia C Castonguay A1 Rishi Gupta A1 Chung-Huan J Sun A1 Coleman Martin A1 William E Holloway A1 Nils Mueller-Kronast A1 Joey D English A1 Tim W Malisch A1 Franklin A Marden A1 Hormozd Bozorgchami A1 Andrew Xavier A1 Ansaar T Rai A1 Michael T Froehler A1 Aamir Badruddin A1 Thanh N Nguyen A1 M Asif Taqi A1 Michael G Abraham A1 Vallabh Janardhan A1 Hashem Shaltoni A1 Roberta Novakovic A1 Albert J Yoo A1 Alex Abou-Chebl A1 Peng R Chen A1 Gavin W Britz A1 Ritesh Kaushal A1 Ashish Nanda A1 Mohammad A Issa A1 Raul G Nogueira A1 Osama O Zaidat YR 2016 UL http://jnis.bmj.com/content/8/3/224.abstract AB Background Mechanical thrombectomy with stent-retrievers results in higher recanalization rates compared with previous devices. Despite successful recanalization rates (Thrombolysis in Cerebral Infarction (TICI) score ≥2b) of 70–83%, good outcomes by 90-day modified Rankin Scale (mRS) score ≤2 are achieved in only 40–55% of patients. We evaluated predictors of poor outcomes (mRS >2) despite successful recanalization (TICI ≥2b) in the North American Solitaire Stent Retriever Acute Stroke (NASA) registry.Methods Logistic regression was used to evaluate baseline characteristics and recanalization outcomes for association with 90-day mRS score of 0–2 (good outcome) vs 3–6 (poor outcome). Univariate tests were carried out for all factors. A multivariable model was developed based on backwards selection from the factors with at least marginal significance (p≤0.10) on univariate analysis with the retention criterion set at p≤0.05. The model was refit to minimize the number of cases excluded because of missing covariate values; the c-statistic was a measure of predictive power.Results Of 354 patients, 256 (72.3%) were recanalized successfully. Based on 234 recanalized patients evaluated for 90-day mRS score, 116 (49.6%) had poor outcomes. Univariate analysis identified an increased risk of poor outcome for age ≥80 years, occlusion site of internal carotid artery (ICA)/basilar artery, National Institute of Health Stroke Scale (NIHSS) score ≥18, history of diabetes mellitus, TICI 2b, use of rescue therapy, not using a balloon-guided catheter or intravenous tissue plasminogen activator (IV t-PA), and >30 min to recanalization (p≤0.05). In multivariable analysis, age ≥80 years, occlusion site ICA/basilar, initial NIHSS score ≥18, diabetes, absence of IV t-PA, ≥3 passes, and use of rescue therapy were significant independent predictors of poor 90-day outcome in a model with good predictive power (c-index=0.80).Conclusions Age, occlusion site, high NIHSS, diabetes, no IV t-PA, ≥3 passes, and use of rescue therapy are associated with poor 90-day outcome despite successful recanalization.