Early plasma ferritin concentrations are not associated with time to red cell transfusions in extremely and very preterm neonates: a prospective single-site observational study
Bibliographic record
Abstract
OBJECTIVE: To assess the relationship between plasma ferritin concentrations and (1) antenatal factors and (2) requirement for red cell transfusion. STUDY DESIGN: This single-site prospective study recruited infants in the first week of life who were born <32 weeks' corrected gestational age and did not receive a red cell transfusion prior to sampling. Ferritin concentrations were assessed on discard plasma taken as part of routine neonatal investigations in the first week of life (median day of life=3, IQR 2-5 days). Reasons for delivery, placental histology and demographics were recorded. RESULTS: Plasma ferritin concentrations were not significantly associated with birth weight or gestational age in this cohort of extremely/very preterm neonates (n=114: n=26, <28 weeks' corrected gestational age; n=88, 28-32 weeks' corrected gestational age). Neonates exposed to chorioamnionitis had an increased ferritin concentration versus those who were not. Neonates exposed to pre-eclampsia had a significantly lower ferritin concentration than those who were not. Early ferritin concentration was not associated with time to transfusion in a time to event analysis. CONCLUSIONS: Plasma ferritin concentrations in very/extremely preterm neonates are variable and associated with the intrauterine environment. Ferritin concentration was not predictive of time to transfusion in this cohort and was not significantly different at smaller birth weight or earlier gestation. This is important for considerations of iron storage in very preterm neonates and its developmental consequences.
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.001 |
| 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) | 0.000 | 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".