TY - JOUR T1 - Predictors of poor outcome despite recanalization: a multiple regression analysis of the NASA registry JF - Journal of NeuroInterventional Surgery JO - J NeuroIntervent Surg SP - 224 LP - 229 DO - 10.1136/neurintsurg-2014-011525 VL - 8 IS - 3 AU - Italo Linfante AU - Amy K Starosciak AU - Gail R Walker AU - Guilherme Dabus AU - Alicia C Castonguay AU - Rishi Gupta AU - Chung-Huan J Sun AU - Coleman Martin AU - William E Holloway AU - Nils Mueller-Kronast AU - Joey D English AU - Tim W Malisch AU - Franklin A Marden AU - Hormozd Bozorgchami AU - Andrew Xavier AU - Ansaar T Rai AU - Michael T Froehler AU - Aamir Badruddin AU - Thanh N Nguyen AU - M Asif Taqi AU - Michael G Abraham AU - Vallabh Janardhan AU - Hashem Shaltoni AU - Roberta Novakovic AU - Albert J Yoo AU - Alex Abou-Chebl AU - Peng R Chen AU - Gavin W Britz AU - Ritesh Kaushal AU - Ashish Nanda AU - Mohammad A Issa AU - Raul G Nogueira AU - Osama O Zaidat Y1 - 2016/03/01 UR - http://jnis.bmj.com/content/8/3/224.abstract N2 - 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. ER -