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Published on: December 31, 2015
Investigating the variations in survival rates for very preterm infants in 10 European regions: the MOSAIC birth
E S Draper1, J Zeitlin, A C Fenton
1Department of Health Sciences, University of Leicester, 22-28, Princess Road West, Leicester LE1 6TP, UK. msn@leicester.ac.uk
Insights
Survival rates for very preterm infants varied significantly across European regions, highlighting the need for standardized data collection. This study examines mortality and survival in neonatal intensive care units (NICUs).
Area of Science:
- Neonatalogy and Perinatal Medicine
- Public Health and Epidemiology
- Pediatric Critical Care
Background:
- Significant variations exist in the survival rates and mortality patterns of very preterm infants across different European regions.
- Understanding these regional disparities is crucial for improving neonatal care outcomes and developing targeted interventions.
Purpose of the Study:
- To investigate and quantify the variation in survival and mortality rates among very preterm infants across geographically defined European regions.
- To analyze the timing of deaths in relation to gestational age and regional differences in neonatal intensive care unit (NICU) admission and survival.
Main Methods:
- Prospective birth cohort study of very preterm infants (gestational age 22 to 31 weeks) across 10 European regions in 2003.
- Data collection included all pregnancy outcomes, focusing on survival to discharge from hospital, and detailed analysis of mortality timing.
- Gestational age groups were analyzed, with specific attention to infants born before 24 weeks and between 24-27 weeks.
Main Results:
- Overall survival to discharge was 89.5%, with regional variations ranging from 74.8% to 93.2%.
- Survival rates for infants less than 24 weeks' gestation were below 2%, and approximately 50% for those between 24-27 weeks.
- Significant regional differences were observed in the timing of infant deaths and NICU admission rates, particularly for the most premature infants.
Conclusions:
- Wide variations in survival rates and timing of death for very preterm infants necessitate standardized data collection methods for accurate international comparisons.
- Proposes using 'infants alive at the onset of labor' as a standardized denominator for comparing mortality rates across different regions and gestational age bands.
Objective:
To investigate the variation in the survival rate and the mortality rates for very preterm infants across Europe.
Design:
A prospective birth cohort of very preterm infants for 10 geographically defined European regions during 2003, followed to discharge home from hospital.
Participants:
All deliveries from 22 + 0 to 31 + 6 weeks' gestation.
Main Outcome Measure:
All outcomes of pregnancy by gestational age group, including termination of pregnancy for congenital anomalies and other reasons, antepartum stillbirth, intrapartum stillbirth, labour ward death, death after admission to a neonatal intensive care unit (NICU) and survival to discharge.
Results:
Overall the proportion of this very preterm cohort who survived to discharge from neonatal care was 89.5%, varying from 93.2% to 74.8% across the regions. Less than 2% of infants <24 weeks' gestation and approximately half of the infants from 24 to 27 weeks' gestation survived to discharge home from the NICU. However large variations were seen in the timing of the deaths by region. Among all fetuses alive at onset of labour of 24-27 weeks' gestation, between 84.0% and 98.9% were born alive and between 64.6% and 97.8% were admitted to the NICU. For babies <24 weeks' gestation, between 0% and 79.6% of babies alive at onset of labour were admitted to neonatal intensive care.
Conclusions:
There are wide variations in the survival rates to discharge from neonatal intensive care for very preterm deliveries and in the timing of death across the MOSAIC regions. In order to directly compare international statistics for mortality in very preterm infants, data collection needs to be standardised. We believe that the standard point of comparison should be using all those infants alive at the onset of labour as the denominator for comparisons of mortality rates for very preterm infants analysing the cohort by gestational age band.
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