ArticleJournal of perinatology : official journal of the California Perinatal Association2026
Risk of unexpected newborn complications by day of the week and time of birth in US term singleton births.
Article in Journal of perinatology : official journal of the California Perinatal Association, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Authors and funding
8 authors.
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Abstract
objectiveTo evaluate how the risk of unexpected newborn complications among term births varied by time of birth for 12.4 million full-term singleton births in the United States. STUDY
designA population-based nationwide study. Exposures included time of birth, divided into four shifts and 42 distributed 4-h intervals. Logistic regression estimated the variations in the risk of unexpected newborn complications.
resultThe risk of unexpected newborn complications was higher during night shifts (OR 1.13, 95% CI: 1.12-1.14) and on weekends than on day shifts and weekdays. The risk of seizures and a 5-min Apgar score ≤3 increased steadily at the start of day shifts (07:00), while the risks of transfer, assisted ventilation ≥6 h, and neonatal death remained stable during day shifts. All outcomes increased during night shifts, peaking between 23:00 and 06:59.
conclusionUnexpected newborn complications were more frequent during night shifts and weekends, particularly between 23:00 and 06:59.
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