Packed Red Blood Cell Transfusion and Decreased Mortality in Intracerebral Hemorrhage
Bibliographic record
Abstract
BACKGROUND: Accumulating data suggest that anemia worsens outcomes in critically ill patients, including those with subarachnoid and intracerebral hemorrhage (ICH). Although packed red blood cell (PRBC) transfusion appears to increase brain tissue oxygen, it is unknown whether such transfusions, which are commonly administered in patients with intracranial hemorrhage, alter outcome. OBJECTIVE: Following up on our observation that anemia is associated with poor outcome in patients with ICH, we investigated whether PRBC transfusion was associated with any benefit. METHODS: Five hundred forty-six consecutive subjects were identified from an ongoing single-center, prospective cohort study of nontraumatic ICH over a 6-year period. Clinical and radiographic characteristics, laboratory values including admission and daily mean hemoglobin values, and all instances of PRBC transfusion were recorded. Aggressiveness of care was assessed by whether the patient had a "do not resuscitate" order activated during hospitalization. The primary endpoint was 30-day survival. RESULTS: Anemia was present in 144 of 546 patients (26%) on admission and developed subsequently in an additional 250, leaving just 152 of 546 patients (28%) who never developed anemia. PRBC transfusion was administered to 100 patients (18%) during their hospital stay, 98% of whom were anemic. In multivariable analysis, PRBC transfusion was associated with improved survival at 30 days (odds ratio: 2.76; 95% confidence interval: 1.45-5.26; P = .002). CONCLUSION: Anemia develops in the majority of patients with ICH at some point during their hospitalization. PRBC transfusion was associated with improved outcome in these patients.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| 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 teacher head, 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".