Abstract 86: Outcomes of Endovascular Therapy for Late Large Vessel Occlusion in Patients With Pre-Stroke Disability
Bibliographic record
Abstract
Background: There is a paucity of research to develop evidence-based recommendations for endovascular management in the extended time window (>6 hours after time last seen well [TLSW]) for large vessel occlusion (LVO) patients with pre-stroke disability. Methods: We analyzed data from a multinational cohort (66 sites, 10 countries from 2014 to 2022) of acute ischemic stroke patients with pre-stroke modified Rankin Scale (mRS) 0-4 and anterior or posterior circulation LVO who received endovascular therapy 6-24 hours after TLSW. The primary outcome was the composite of functional independence (FI, mRS 0-2) or return to pre-stroke mRS (return of Rankin, RoR) at 90 days. Outcomes were compared between patients with pre-stroke disability (pre-stroke mRS 2-4) vs those without (mRS 0-1). Results: There were 2231 patients (median age 77 years; median NIH Stroke Scale 16) included in the present study, of whom 564 (25.3%) had pre-stroke disability. The primary outcome (FI or ROR) was seen in 30.7% of patients with pre-stroke disability (FI, 16.5%; RoR 30.7%), compared with 44.1% of those without (FI, 44.1%; RoR 13.0%) ( P <0.0001, Figure 1 ). In both multivariable logistic regression and inverse probability of treatment weighting analysis, pre-stroke disability was not associated with a lower odds of achieving FI or RoR (adjusted odds ratio [aOR] 0.76, 95% confidence interval [CI] 0.50-1.15 and aOR 0.73, 95% CI 0.43-1.25, respectively). FI or ROR was achieved at a higher percentage with reperfusion with mTICI ≥2b than with mTICI 0-2a, both in patients with pre-stroke disability (34.8% vs 10.8%, P <0.0001) and in those without (49.2% vs 12.1%, P <0.0001). Symptomatic intracranial hemorrhage occurred in 6.3% in both groups ( P =0.995). Conclusions: A substantial proportion of late LVO patients with pre-stroke disability regained pre-stroke mRS after EVT and did not have a worse functional prognosis than patients without pre-stroke disability when their pre-stroke mRS was considered.
Fetched live from OpenAlex and de-inverted. Abstracts are not stored in this database: the inverted indexes are 8.6 GB of the frame’s 9.3 GB of text, and the host has 13 GB free.
How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.002 | 0.005 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.000 | 0.001 |
| Insufficient payload (model declined to judge) | 0.003 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".