title: Linear association between maternal age and spontaneous breech presentation in singleton pregnancies after 32 weeks gestation.
abstract: OBJECTIVE
  To investigate the association between maternal age and spontaneous breech presentation.
  
  
  METHODS
  Fifteen-year observational study over (2001-2015). All consecutive singleton births delivered at the Centre Hospitalier Universitaire Sud Reunion's maternity. The only single exclusion criterion was uterine malformations (N = 123) women.
  
  
  RESULTS
  Of the 60,963 singleton births, there was a linear association (χ2for linear trend, p< 0.0001) between maternal age and spontaneous breech presentation. Overall rate of breech presentation was 2.7% in deliveries over 32 weeks gestation, while it was 1.9% in women aged 15 to 19 years and 4.0% in women aged 45+, with a linear progression for each 5-year age category. This linearity remained significant controlling for early prematurity (<33 weeks) and severe fetal malformations (χ2for linear trend = 64, p < 0.0001). Controlling in a multiple logistic regression model for other major risk factors gestational age, female sex, primiparity, maternal age remained significantly an independent risk factor, p < 0.0001.
  
  
  CONCLUSIONS
  Maternal age (x) is an independent factor for breech presentation in singleton pregnancies after 32 weeks gestation with a linear association that may be approximated at y = 0.1x. (y: incidence, percent).
authors.affiliation: a Service de Néonatologie , Centre Hospitalier Universitaire Sud Réunion , La Réunion , Saint Pierre , France.|b Centre d'Etudes Périnatales Océan Indien (CEPOI), Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.
authors.forename: Pierre-Yves
authors.initials: PY
authors.lastname: Robillard
authors.affiliation: b Centre d'Etudes Périnatales Océan Indien (CEPOI), Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.|c Service de Gynécologie et Obstétrique , Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.
authors.forename: Malik
authors.initials: M
authors.lastname: Boukerrou
authors.affiliation: a Service de Néonatologie , Centre Hospitalier Universitaire Sud Réunion , La Réunion , Saint Pierre , France.|b Centre d'Etudes Périnatales Océan Indien (CEPOI), Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.
authors.forename: Francesco
authors.initials: F
authors.lastname: Bonsante
authors.affiliation: d Department of epidemiology, school of public health , West Virginia University, School of Public Health , Morgantown , VA , USA.
authors.forename: Thomas C
authors.initials: TC
authors.lastname: Hulsey
authors.affiliation: e Department of Obstetrics and Gynaecology , University of Adelaide, Robinson Institute. Lyell McEwin Hospital , Elizabeth Vale , Australia.
authors.forename: Gustaaf
authors.initials: G
authors.lastname: Dekker
authors.affiliation: a Service de Néonatologie , Centre Hospitalier Universitaire Sud Réunion , La Réunion , Saint Pierre , France.|b Centre d'Etudes Périnatales Océan Indien (CEPOI), Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.
authors.forename: Jean-Bernard
authors.initials: JB
authors.lastname: Gouyon
authors.affiliation: a Service de Néonatologie , Centre Hospitalier Universitaire Sud Réunion , La Réunion , Saint Pierre , France.|b Centre d'Etudes Périnatales Océan Indien (CEPOI), Centre Hospitalier Universitaire Sud Réunion , La reunion , Saint Pierre , France.
authors.forename: Silvia
authors.initials: S
authors.lastname: Iacobelli
mesh_terms: D000293:Adolescent; D000328:Adult; D001946:Breech Presentation / Q000453:epidemiology*; D002648:Child; D005260:Female; D006801:Humans; D008423:Maternal Age; D008875:Middle Aged; D011247:Pregnancy; D012189:Retrospective Studies; D017508:Reunion / Q000453:epidemiology; D055815:Young Adult
keywords: Breech presentation; factors predisposing to breech presentation; obstetrics database