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Neonatal mortality in weekend vs weekday births
Jeffrey B Gould1, Cheng Qin, Amy R Marks
1School of Public Health, University of California, Berkeley, USA. jbgould@stanford.edu
Insights
Neonatal mortality rates for infants born on weekends were slightly higher, but this difference disappeared after accounting for birth weight. This suggests no compromise in perinatal care quality over weekends.
Area of Science:
- Perinatal medicine
- Neonatal health
- Public health
Background:
- Historical concerns about weekend neonatal mortality exist.
- Contemporary data on daily variations in neonatal outcomes are lacking.
- Concerns about weekend healthcare adequacy persist.
Purpose of the Study:
- To compare neonatal mortality between weekday and weekend births.
- To evaluate daily patterns in births, obstetric interventions, and case mix-adjusted mortality.
Main Methods:
- A case series analysis of 1,615,041 live births in California (1995-1997).
- Stratified analyses by birth weight and delivery method.
- Logistic regression used to estimate birth weight-adjusted odds ratios for weekend mortality.
Main Results:
- Weekend births decreased by 17.5%, with fewer cesarean deliveries.
- A higher proportion of very low-birth-weight infants were born on weekends.
- Observed neonatal mortality was higher on weekends, but this difference was not significant after adjusting for birth weight.
Conclusions:
- The goal of optimal perinatal care irrespective of day of the week is crucial.
- Birth weight-adjusted analysis revealed no evidence of compromised perinatal care quality on weekends in California.
- Findings indicate that birth weight is a key factor in understanding weekend neonatal mortality differences.
Context:
Increases in neonatal mortality for infants born on the weekend were last noted several decades ago. Although the current health care environment has raised concern about the adequacy of weekend care, there have been no contemporary evaluations of daily patterns of births, obstetric intervention, and case mix-adjusted neonatal mortality.
Objective:
To compare the neonatal mortality of infants born on weekdays and weekends.
Design, Setting, And Participants:
Case series of 1 615 041 live births (weight >or=500 g) in California between 1995-1997 to determine patterns of births, cesarean deliveries, and neonatal deaths. Analyses were stratified by birth weight and delivery method. To assess the role of weekend differences in case mix, observed and birth weight-adjusted odds ratios (ORs) for increased weekend mortality were estimated using logistic regression.
Main Outcome Measure:
Birth weight-adjusted neonatal mortality.
Results:
There was a 17.5% decrease in births on weekends, accompanied by a decrease in the proportion of cesarean deliveries from 22% on weekdays to 16% on weekends. Weekend decreases in births were least pronounced in smaller infants, resulting in a weekend concentration of high-mortality, very low-birth-weight (<1500 g) births. Observed neonatal mortality increased from 2.80 per 1000 weekday births to 3.12 per 1000 weekend births (OR, 1.12; 95% confidence interval [CI], 1.05-1.19; P =.001) for all births, and from 4.94 to 6.85 (OR, 1.39; 95% CI, 1.25-1.55; P<.001) for cesarean deliveries. After adjusting for birth weight, the increased odds of death for infants born on the weekend were no longer significant.
Conclusions:
The provision of optimal care regardless of the day of week is an important goal for perinatal medicine. Comparing the neonatal mortality of infants born on weekdays and weekends provides a straightforward assessment of this goal. After controlling for birth weight, we found no evidence that the quality of perinatal care in California was compromised during the weekend.
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