title: Maternal outcomes according to placental position in placental previa.
abstract: OBJECTIVE
  The purpose of this retrospective cohort study was to elucidate whether the location of placenta below uterine incision in cesarean section is important in the development of maternal complications in placenta previa patients.
  
  
  METHODS
  The study was conducted on 409 patients 414 parturition at 3 hospitals in affiliation with the Catholic Medical Center, Seoul, Korea from May 1999 to December 2009. The subjects were divided to two groups: the group whose placenta was located in the anterior portion of the uterus (anterior group) and the group whose placenta was located in the posterior portion of the uterus (posterior group). And then they are compared to each other. Logistic regression was used to control for confounding factors.
  
  
  RESULTS
  In the anterior group, regardless of confounding factors, the incidence of excessive blood loss (OR 2.97; 95% CI: 1.64-5.37), massive transfusion (OR 3.31; 95% CI: 1.33-8.26), placental accreta (OR 2.60, 95% CI: 1.40-4.83), and hysterectomy (OR 3.47, 95% CI: 1.39-8.68) was higher.
  
  
  CONCLUSIONS
  Sonographic determination of the placental position where its location beneath the uterine incision is very important to predict maternal outcomes in placenta previa patients, and such cases, close attention should be paid for massive hemorrhage.
authors.affiliation: Department of Obstetrics and Gynecology, School of Medicine, The Catholic University of Korea, Seoul, Korea.
authors.forename: Dong Gyu
authors.initials: DG
authors.lastname: Jang
authors.forename: Ji Sun
authors.initials: JS
authors.lastname: We
authors.forename: Jae Un
authors.initials: JU
authors.lastname: Shin
authors.forename: Yun Jin
authors.initials: YJ
authors.lastname: Choi
authors.forename: Hyun Sun
authors.initials: HS
authors.lastname: Ko
authors.forename: In Yang
authors.initials: IY
authors.lastname: Park
authors.forename: Jong Chul
authors.initials: JC
authors.lastname: Shin
mesh_terms: D000328:Adult; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data; D001803:Blood Transfusion / Q000706:statistics & numerical data; D002585:Cesarean Section / Q000401:mortality; D004812:Epidemiologic Methods; D005260:Female; D006801:Humans; D007044:Hysterectomy / Q000706:statistics & numerical data; D010921:Placenta Accreta / Q000000981:diagnostic imaging; D010923:Placenta Previa / Q000000981:diagnostic imaging*; D011247:Pregnancy; D011379:Prognosis; D014463:Ultrasonography