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Observational Study
. 2023 Feb 1;80(2):172-182.
doi: 10.1001/jamaneurol.2022.4714.

Association of Endovascular Thrombectomy vs Medical Management With Functional and Safety Outcomes in Patients Treated Beyond 24 Hours of Last Known Well: The SELECT Late Study

Affiliations
Observational Study

Association of Endovascular Thrombectomy vs Medical Management With Functional and Safety Outcomes in Patients Treated Beyond 24 Hours of Last Known Well: The SELECT Late Study

Amrou Sarraj et al. JAMA Neurol. .

Abstract

Importance: The role of endovascular thrombectomy is uncertain for patients presenting beyond 24 hours of the time they were last known well.

Objective: To evaluate functional and safety outcomes for endovascular thrombectomy (EVT) vs medical management in patients with large-vessel occlusion beyond 24 hours of last known well.

Design, setting, and participants: This retrospective observational cohort study enrolled patients between July 2012 and December 2021 at 17 centers across the United States, Spain, Australia, and New Zealand. Eligible patients had occlusions in the internal carotid artery or middle cerebral artery (M1 or M2 segment) and were treated with EVT or medical management beyond 24 hours of last known well.

Interventions: Endovascular thrombectomy or medical management (control).

Main outcomes and measures: Primary outcome was functional independence (modified Rankin Scale score 0-2). Mortality and symptomatic intracranial hemorrhage (sICH) were safety outcomes. Propensity score (PS)-weighted multivariable logistic regression analyses were adjusted for prespecified clinical characteristics, perfusion parameters, and/or Alberta Stroke Program Early CT Score (ASPECTS) and were repeated in subsequent 1:1 PS-matched cohorts.

Results: Of 301 patients (median [IQR] age, 69 years [59-81]; 149 female), 185 patients (61%) received EVT and 116 (39%) received medical management. In adjusted analyses, EVT was associated with better functional independence (38% vs control, 10%; inverse probability treatment weighting adjusted odds ratio [IPTW aOR], 4.56; 95% CI, 2.28-9.09; P < .001) despite increased odds of sICH (10.1% for EVT vs 1.7% for control; IPTW aOR, 10.65; 95% CI, 2.19-51.69; P = .003). This association persisted after PS-based matching on (1) clinical characteristics and ASPECTS (EVT, 35%, vs control, 19%; aOR, 3.14; 95% CI, 1.02-9.72; P = .047); (2) clinical characteristics and perfusion parameters (EVT, 35%, vs control, 17%; aOR, 4.17; 95% CI, 1.15-15.17; P = .03); and (3) clinical characteristics, ASPECTS, and perfusion parameters (EVT, 45%, vs control, 21%; aOR, 4.39; 95% CI, 1.04-18.53; P = .04). Patients receiving EVT had lower odds of mortality (26%) compared with those in the control group (41%; IPTW aOR, 0.49; 95% CI, 0.27-0.89; P = .02).

Conclusions and relevance: In this study of treatment beyond 24 hours of last known well, EVT was associated with higher odds of functional independence compared with medical management, with consistent results obtained in PS-matched subpopulations and patients with presence of mismatch, despite increased odds of sICH. Our findings support EVT feasibility in selected patients beyond 24 hours. Prospective studies are warranted for confirmation.

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Conflict of interest statement

Conflict of Interest Disclosures: Dr Sarraj reported grants and personal fees from Stryker Neurovascular and personal fees from AstraZeneca outside the submitted work. Dr Hassan reported consultant and/or speaker fees from Medtronic, Microvention, Stryker, Penumbra, Cerenovus, Genentech, GE Healthcare, Scientia, Balt, Viz.ai, Insera Therapeutics, Proximie, NeuroVasc, NovaSignal, Vesalio, Rapid Medical, Imperative Care, and Galaxy Therapeutics outside the submitted work. Dr Ortega-Gutierrez reported grants from Stryker Neurovascular, grants from Methinks, VizIA, National Institutes of Health (NIH), Medtronic, and Microvention and proctor fees from Medtronic and Stryker outside the submitted work. Dr Abraham reported consulting fees from Stryker Neurovascular outside the submitted work. Dr Siegler reported speakers bureau fees from AstraZeneca outside the submitted work. Dr Arenillas reported grants from the Ministry of Science, Spain, and AstraZeneca and personal fees from Medtronic, Boehringer Ingelheim, Amgen, Bayer, BMS-Pfizer, and Daichii-Sankyo outside the submitted work. Dr Wallace reported personal fees from Feldman Shepherd and Robins Kaplan outside the submitted work. Dr Gibson reported personal fees from Siemens Healthineers outside the submitted work. Dr Mitchell reported institutional research support from Stryker Neurovascular and Medtronic outside the submitted work. Dr Arthur reported personal fees from Balt, Cerenovus, Medtronic, Microvention, Penumbra, Scientia, and Stryker and being a shareholder in Bendit, Cerebrotech, and Magneto outside the submitted work. Dr Grotta reported personal fees from Frazer, Haemonetics, Acticor, and Prolong and grants from Genentech, CSL Behring, and Chiesi outside the submitted work. Dr Albers reported consulting fees from and equity in iSchemaView and consulting and other fees from Genentech outside the submitted work. No other disclosures were reported.

Figures

Figure 1.
Figure 1.. Study Flowchart
Patients screened included those with intracranial hemorrhage, subarachnoid hemorrhage, or transient ischemic attack who presented beyond 24 hours after last known well. The control group received medical management only. CT ASPECTS indicates computed tomography Alberta Stroke Program Early CT Score; ICA/M1/M2, internal carotid artery or M1 or M2 segment of the middle cerebral artery; EVT, endovascular thrombectomy; PS, propensity score.
Figure 2.
Figure 2.. Distribution of 90-Day Modified Rankin Scale (mRS) Scores in the Study Population According to Type of Treatment Received
The control group received medical management only. Modified Rankin Scale scores range from 0 to 6 with higher scores indicating worse outcomes.
Figure 3.
Figure 3.. Predicted Probability of Symptomatic Intracranial Hemorrhage (ICH) and Association With Time Between Symptom Onset and Treatment
The graph illustrates the potential increase in the rate of symptomatic ICH as time progresses (P = .06). Shading indicates 95% CIs. SITS-MOST indicates the Safe Implementation of Thrombolysis in Stroke–Monitoring Study.

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