Spontaneous Intracranial Hemorrhage and Oral Anticoagulation: A Retrospective Study
Bibliographic record
Abstract
Background: Canadian data on intracranial hemorrhage (ICH) associated with oral anticoagulation is limited. Objectives: Primary study outcomes were baseline hematoma volumes and in-hospital mortality in patients with ICH associated with direct oral anticoagulants (DOACs) versus vitamin K antagonists (VKAs). Secondary outcomes included the use of four-factor prothrombin complex concentrate (4f-PCC). Methods: Retrospective cohort study of patients with ICH associated with oral anticoagulation in three tertiary care hospitals in Montreal, Canada, between 2011 and 2018. Results: Twenty-nine patients were receiving DOACs and 114 patients were under VKAs. Median baseline hematoma volumes were similar, 14.8 ml [5.7–42.8] in the DOAC group and 15.6 ml [5.9–38.1] in the VKA group (p = 0.91). In-hospital mortality rate was 34.5% in the DOAC group and 48.2% in the VKA group (p = 0.26). Only 17 patients (58.6%) in the DOAC group received 4f-PCC. Conclusion: Our study did not demonstrate significant differences in outcomes of ICH associated with DOACs versus VKAs. Management approaches were variable.
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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 | 0.001 | 0.004 |
| Meta-epidemiology (narrow) | 0.000 | 0.001 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.002 | 0.004 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 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".