title: Trends in All-Cause Mortality across Gestational Age in Days for Children Born at Term.
abstract: BACKGROUND
  Term birth is a gestational age from 259 days to 293 days. However trends in mortality according to gestational ages in days have not yet been described in this time period.
  
  
  RESULTS
  Based on nation-wide registries, we conducted a population-based cohort study among all children born at term in Denmark from 1997 to 2004 to estimate differences in mortality across gestational ages in days among singletons born at term. We studied early-neonatal mortality, neonatal mortality, infant mortality, and five-year mortality. Children were followed from birth up to the last day of the defined mortality period or December 31, 2009. A total of 360,375 singletons born between 259 and 293 days of gestation were included in the study. Mortality decreased with increasing gestational age in days and the highest mortality was observed among children born at 37 week of gestation. A similar pattern was observed when analyses were restricted to children born to by mothers without pregnancy complications.
  
  
  CONCLUSIONS
  This study demonstrates heterogeneity in mortality rates even among singletons born at term. The highest mortality was observed among children born 37 weeks of gestation, which call for cautions when inducing labor in term pregnancies just reaching 37 weeks of gestation. The findings support that 37 weeks of gestation should be defined as early term.
authors.affiliation: Research Unit on Gynecology and Obstetrics, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.|Department of Gynecology and Obstetrics, Odense University Hospital, Odense, Denmark.|Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: Chun Sen
authors.initials: CS
authors.lastname: Wu
authors.affiliation: Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark.
authors.forename: Yuelian
authors.initials: Y
authors.lastname: Sun
authors.affiliation: Research Unit on Gynecology and Obstetrics, Institute of Clinical Research, University of Southern Denmark, Odense, Denmark.|Department of Gynecology and Obstetrics, Odense University Hospital, Odense, Denmark.
authors.forename: Ellen Aagaard
authors.initials: EA
authors.lastname: Nohr
authors.affiliation: Section for Epidemiology, Department of Public Health, Aarhus University, Aarhus, Denmark.|Department of Epidemiology, School of Public Health, University of California Los Angeles, Los Angeles, CA, United States of America.
authors.forename: Jørn
authors.initials: J
authors.lastname: Olsen
mesh_terms: D001724:Birth Weight; D002675:Child, Preschool; D015331:Cohort Studies; D003718:Denmark / Q000453:epidemiology; D005260:Female; D005865:Gestational Age; D006801:Humans; D007223:Infant; D007226:Infant Mortality / Q000639:trends*; D008297:Male; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D047929:Term Birth