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Updated: Aug 18, 2025

Establishing a Competing Risk Regression Nomogram Model for Survival Data
Published on: October 23, 2020
Apgar scores correlate with survival rate at discharge in extremely preterm infants with gestational age of 25-27
Lili Lin1,2, Guosheng Liu1, Ying Li2
1Department of Neonatology, the First Affiliated Hospital of Jinan University, Guangzhou, Guangdong, China.
Insights
The Apgar score, a measure of newborn health, is linked to survival in extremely preterm infants (gestational age 25-27 weeks). Higher scores generally correlate with better survival rates, though nuances exist for specific time points and gestational ages.
Area of Science:
- Neonatal Medicine
- Pediatrics
- Perinatology
Background:
- Low Apgar scores indicate higher mortality risk in newborns.
- The Apgar score's utility in assessing extremely preterm infants remains debated.
- Extremely preterm infants require specialized evaluation due to their vulnerability.
Purpose of the Study:
- To characterize Apgar score distribution in extremely preterm infants (25-27 weeks gestation).
- To investigate the association between Apgar scores and survival rates in this population.
- To analyze clinical data from a large cohort of extremely preterm infants in China.
Main Methods:
- Retrospective analysis of clinical data from 1567 extremely preterm infants.
- Data collected from 26 neonatal intensive care units in Guangdong Province, China (2008-2017).
- Statistical analysis of Apgar scores (1, 5, and 10 min) in relation to gestational age, birth weight, and survival to discharge.
Main Results:
- Apgar scores increased with gestational age (25-27 weeks) and post-birth time (1-10 min).
- Higher Apgar scores were associated with increased survival rates.
- No significant association was found between 1-min Apgar and survival for 25-26 week infants, nor 5-min Apgar for 25-week infants.
Conclusions:
- Apgar scores are associated with survival outcomes in extremely preterm infants.
- The predictive value of Apgar scores may vary based on gestational age and time point.
- Further research is needed to refine the use of Apgar scores in extremely preterm neonates.
Abstract:
Low Apgar score is associated with increased risk of death in preterm or full-term infants. However, the use of Apgar score to assess extremely preterm (EP) infants is controversial. In this study, we characterized the distribution of Apgar scores in EP infants with gestational age between 25 and 27 weeks, and investigated the association of Apgar score with survival rate at discharge by analyzing the clinical data of the EP infants discharged between January 2008 and December 2017 from 26 neonatal intensive care units in Guangdong Province, China. A total of 1567 infants with gestational age of 26.84±0.79 weeks and birth weight of 951±169 grams were involved in our study. The Apgar score increased with gestational age from 25 to 27 weeks and with time from birth from 1 to 10 min. The survival rate increased with a higher Apgar score, but no significant difference was found for 1-min Apgar score and the survival rate between infants with 25 or 26 weeks of gestation or 5-min Apgar score in infants with 25 weeks of gestation. The Apgar score is associated with survival of EP infants.
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