Pulmonary Hemodynamics and Long-Term Outcomes in Children with Pulmonary Hypertension-Associated Bronchopulmonary Dysplasia
Bibliographic record
Abstract
OBJECTIVE: To determine whether the severity of pulmonary hypertension (PH), assessed at cardiac catheterization, is associated with bronchopulmonary dysplasia (BPD) severity and mortality. STUDY DESIGN: We analyzed clinical data from subjects with BPD-PH enrolled in the PPHNet Registry between 2014 and 2024. BPD severity was based on the Neonatal Research Network grading system at 36 weeks postmenstrual age. Survival and clinical associations were estimated using Cox proportional hazards regression with delayed entry-to-risk-set and competing risk methodologies. RESULTS: The study included 320 subjects (gestational age, 25.8 ± 2.0 weeks (range 22.2 to 31.6 weeks); postnatal age 5.0 months (IQR 3.3, 8.6; range birth to 12 years) at the time of PH diagnosis. The severity of BPD was 27% (grade 1), 44% (grade 2), and 29% grade 3. Twenty-two percent (n = 69) of subjects underwent cardiac catheterization within 1 month of echocardiographic diagnosis of PH. Hemodynamic features by cardiac catheterization were similar between grades of BPD severity. Five-year survival postdiagnosis was 94%, 94%, and 87%, respectively, for Grades 1, 2, and 3 BPD. Twenty-five of 320 (8%) subjects died, including 6 with pulmonary vein stenosis. CONCLUSIONS: Among subjects with BPD-PH undergoing cardiac catheterization, more deaths occurred among children with Grade 3 BPD. However, there were no substantive differences in invasive measurements of pulmonary hemodynamics based on BPD severity.
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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 | 0.003 |
| 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 | 0.001 |
| Scholarly communication | 0.001 | 0.001 |
| Open science | 0.000 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| 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".