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Modelling mortality and morbidity of newborns
C Ritter1, A Bouckaert, M Van Lierde
1Institut de Statistique, Université Catholique de Louvain, Louvain-la-Neuve, Belgium.
Statistics in Medicine
|October 30, 1995
Summary
Simple birthweight centiles effectively identify at-risk newborns for mortality. This study compares various classification rules, finding marginal birthweight centiles nearly as accurate as complex models for neonatal mortality risk assessment.
Area of Science:
- Neonatal Medicine
- Perinatal Epidemiology
- Biostatistics
Background:
- Accurate identification of newborns at risk for mortality and morbidity is crucial for timely intervention.
- Existing methods for risk classification often involve complex models considering birthweight and gestational age.
- The Apgar score is a key indicator for assessing neonatal health at birth.
Purpose of the Study:
- To construct and compare models linking birthweight and gestational age with neonatal mortality and morbidity.
- To evaluate the performance of different classification rules for identifying high-risk newborns.
- To compare the efficacy of simple marginal birthweight centiles against adjusted centiles and iso-mortality contours.
Main Methods:
- Analysis of data from 10,514 singleton births over a decade at a single institution.
- Development of models correlating birthweight and gestational age with mortality and low Apgar scores.
- Comparison of classification rules using receiver operating characteristic (ROC) curves, including iso-mortality contours, marginal birthweight centiles, and gestational age-adjusted birthweight centiles.
Main Results:
- Classification rules based on simple marginal birthweight centiles demonstrated performance nearly equivalent to iso-mortality contours for neonatal mortality.
- Marginal birthweight centiles significantly outperformed birthweight centiles adjusted for gestational age in predicting neonatal mortality.
- Charts comparing mortality and morbidity were developed and contrasted with standard birthweight centile charts.
Conclusions:
- Simple marginal birthweight centiles are a highly effective and practical tool for classifying newborns at risk of neonatal mortality.
- These findings suggest that complex adjustments for gestational age may not be necessary for basic risk stratification concerning mortality.
- The study advocates for the use of readily interpretable marginal birthweight centiles in clinical practice for neonatal risk assessment.