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Predicting survival of infants of birth weight less than 801 grams
Insights
Predicting survival in extremely low birth weight infants is possible using early clinical factors. Birth weight and oxygen levels at 8 hours, and temperature, pH, and breathing at 16-24 hours, help estimate survival chances.
Area of Science:
- Neonatalogy
- Perinatal Medicine
- Pediatric Critical Care
Background:
- Extremely low birth weight (ELBW) infants (<801g) face significant mortality risks.
- Accurate early prediction of survival is crucial for clinical management and parental counseling.
Purpose of the Study:
- To retrospectively determine the likelihood of survival to 28 days for ELBW infants.
- To identify independent predictors of survival at various time points in the neonatal period.
Main Methods:
- Retrospective analysis of 106 infants weighing less than 801g at birth.
- Multiple logistic regression analysis to identify independent predictors of survival.
- Evaluation of predictive accuracy at different time points (8, 16, 24 hours).
Main Results:
- Birth weight and inspired oxygen fraction independently predicted survival at 8 hours (76% accuracy).
- Body temperature, pH, and spontaneous breaths predicted survival at 16-24 hours (79% accuracy).
- Infants with <50% survival chance at 16 hours had a high mortality rate (29/37), with survivors often experiencing complications.
Conclusions:
- Early clinical variables can predict survival in ELBW infants.
- These predictive models offer initial estimations and are not definitive for patient management decisions.
- Survival 'against the odds' may still be associated with significant long-term morbidities.
Abstract:
The likelihood of survival to 28 days of life was determined retrospectively for 106 infants weighing less than 801 g at birth. Multiple logistic regression analysis revealed that birth weight and inspired oxygen fraction made an independent contribution to the prediction of survival at 8 h of age (predictive accuracy 76%). At 16 and 24 h of age, body temperature, pH, and the presence of spontaneous breaths were the independent variables predicting survival (predictive accuracy 79%). Of 37 infants with calculated chances of survival of less than 50% at 16 h, 29 died (predictive accuracy 78%). Seven of the remaining eight infants who survived "against the odds" either died later of chronic lung disease or had severe handicapping complications by 3 months of age. These predictions are first approximations and are not intended for use in making decisions about patient management.