Associations between maternal abortion history and neonatal outcome among very preterm infants: a multicenter cohort study
Bibliographic record
Abstract
BACKGROUND: It is unclear whether there is an association between maternal abortion history and neonatal outcomes of singleton very preterm infants (VPIs). We assess the association between maternal abortion history and neonatal outcome of VPIs in China. METHODS: All first parity singleton VPIs born at < 32 weeks gestational age (GA) who were admitted to neonatal intensive care units (NICU) participating in the Chinese Neonatal Network (CHNN) from 2019 to 2021 were included in the study. Multivariable logistic regression models were constructed to compare neonatal outcomes among infants with different maternal abortion histories after adjusting for confounders. RESULTS: A total of 7256 VPIs were included in this analysis. Overall, 3133 (43.2%) infants had positive maternal abortion history. The incidence of mortality or any major morbidity including respiratory distress syndrome (RDS), patent ductus arteriosus (PDA), intraventricular haemorrhage (IVH), IVH stage 3 or 4, moderate or severe bronchopulmonary dysplasia (BPD), retinopathy of prematurity (ROP), ROP stage 3, 4, or 5 tended to increase significantly with increasing number of maternal abortion histories from non-abortion group to ≥ 2 abortions group. Multivariable analysis showed that maternal abortion history was significantly associated with higher risks of mortality or any major morbidity (adjusted odds ratio [aOR] 1.15, 95% confidence interval [CI] 1.03-1.29), RDS (aOR 1.22, 95%CI 1.08-1.38), IVH (aOR 1.17, 95% CI 1.05-1.31), and IVH stage 3 or 4 (aOR 1.27, 95% CI 1.01-1.59). Risk increased with the number of abortions. VPIs of mothers with two or more abortions had the highest risk of mortality or any major morbidity (aOR 1.18, 95% CI 1.02-1.36), RDS (aOR 1.35, 95% CI 1.18-1.56), IVH (aOR 1.23, 95% CI 1.07-1.43) and moderate or severe BPD (aOR 1.17, 95% CI 1.01-1.36), compared to the non-abortion group. CONCLUSIONS: In China, VPIs born to mothers with previous abortion history may have a greater risk of adverse outcomes. Based on the potential impact of maternal abortion history on newborns, it is necessary to provide additional information on related risks during antenatal counseling for these mothers.
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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) | 0.000 | 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".