ArticleJournal of perinatology : official journal of the California Perinatal Association2021
Association of timing of birth with mortality among preterm infants born in Canada.
Article in Journal of perinatology : official journal of the California Perinatal Association, 2021. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 6 papers.
What it found
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The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
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Who cites it
6 citing papers in PubMed, 13 citations in OpenAlex.
- Effect of birth timing on early morbidity and mortality in very preterm neonates: a single-center retrospective cohort study.BMC pediatrics · 2026Article
- Article
- Neonatal intensive care unit occupancy rate and probability of discharge of very preterm infants.Journal of perinatology : official journal of the California Perinatal Association · 2023Article
- Outcomes of infants with hypoxic-ischemic encephalopathy during COVID-19 pandemic lockdown in Canada: a cohort study.Child's nervous system : ChNS : official journal of the International Society for Pediatric Neurosurgery · 2022Article
- Time at birth and short-term outcomes among extremely preterm infants in Spain: a multicenter cohort study.European journal of pediatrics · 2022Article
- Birth during on-call period: Impact of care organization on mortality and morbidity of very premature neonates.Frontiers in pediatrics · 2022Article
Corrections and comments
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Authors and funding
9 authors at 20 institutions in 1 country.
Funding
No grant is acknowledged in the PubMed record.
Abstract
objectiveTo assess the association between time of birth and mortality among preterm infants. STUDY
designPopulation-based study of infants born 22-36 weeks gestation (GA) in Canada from 2010 to 2015 (n = 173 789). Multivariable logistic regression models assessed associations between timing of birth and mortality.
resultAmong infants 22-27 weeks GA, evening birth was associated with higher mortality than daytime birth (adjusted odds ratio [AOR] 1.14, 95% CI 1.01-1.29). Among infants 28-32 weeks GA and 33-36 weeks GA, night birth was associated with lower mortality than daytime birth (AOR 0.75, 95% CI 0.59-0.95; AOR 0.78, 95% CI 0.62-0.99, respectively). Sensitivity analysis excluding infants with major congenital anomaly revealed that associations between hour of birth and mortality among infants born 28-32 and 33-36 weeks GA decreased or were not statistically significant.
conclusionHigher mortality among extremely preterm infants during off-peak hours may suggest variations in available resources based on time of day.
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Registered trials
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