title: Blood loss after cesarean delivery: a registry-based study in Norway, 1999-2008.
abstract: OBJECTIVE
  The objective of the study was to assess risk factors for moderate and severe blood loss after cesarean delivery (CD).
  
  
  METHODS
  All planned (n = 32,716) and emergency (n = 47,942) cesareans, as reported over a 10-year period to the Medical Birth Registry of Norway, were analyzed separately in a case-control design. Women with moderate (500 to ≤1500 mL) or severe (>1500 mL) blood loss were analyzed with women with blood loss less than 500 mL as controls in SPSS (version 17.0) with χ(2) test and logistic regression.
  
  
  RESULTS
  The prevalence of severe blood loss was consistently higher in emergency (3.2%) than planned CD (1.9%). Planned and emergency CDs share common risk factors for both moderate and severe blood loss, whereas emergency CD carries in addition delivery-related risk factors.
  
  
  CONCLUSIONS
  When revising management schemes for CD, anesthetic procedures should be reconsidered as surgical competence in cases with placenta previa, placental abruption, and low hemoglobin.
authors.affiliation: Department of Clinical Medicine, University of Tromsø, Norway.
authors.forename: Finn Egil
authors.initials: FE
authors.lastname: Skjeldestad
authors.forename: Pål
authors.initials: P
authors.lastname: Oian
mesh_terms: D000293:Adolescent; D000328:Adult; D016063:Blood Loss, Surgical / Q000706:statistics & numerical data*; D016022:Case-Control Studies; D002585:Cesarean Section / Q000009:adverse effects*; D002648:Child; D004638:Emergency Treatment / Q000706:statistics & numerical data; D005260:Female; D006801:Humans; D008875:Middle Aged; D009664:Norway / Q000453:epidemiology; D006473:Postpartum Hemorrhage / Q000453:epidemiology*; D011247:Pregnancy; D015995:Prevalence; D012042:Registries / Q000706:statistics & numerical data*; D012307:Risk Factors; D012720:Severity of Illness Index; D055815:Young Adult