title: Risk factors for obstetric admissions to the intensive care unit in a tertiary hospital: a case-control study.
abstract: OBJECTIVE
  The objective was to review all obstetric admissions to the intensive care unit (ICU) at the Royal Free Hospital, London, UK, and to identify the risk factors for obstetric admissions to the ICU.
  
  
  METHODS
  We carried out a retrospective case-control study. The cases consisted of women admitted to the ICU during pregnancy and up to 42 days postpartum between 1 January 1993 and 31 December 2003. Controls were women who delivered immediately before and after the indexed case. Demographic data, medical and surgical histories, pregnancy, and intrapartum and postpartum data were collected. Statistical analysis was done using SPSS software.
  
  
  RESULTS
  Thirty-three obstetric patients were admitted to the ICU, representing 0.11% of all deliveries. The ICU utilization rate was 0.81%. Eighty percent of the admissions were postpartum. The main indications for admission were hypertensive disorders (39.4%), and obstetric haemorrhage (36.4%). There was no difference between cases and controls in, age, parity, smoking and employment status. Compared with controls, women admitted to the ICU were significantly more likely to be black (P<0.05), have a shorter mean duration of pregnancy (36.6 vs. 39.2 weeks; P=0.006), delivered by emergency caesarean section (P<0.001), and have higher mean blood loss at delivery (1,173 vs. 296 ml; P<0.001). The risk factors for obstetric ICU admission were black race (odds ratio [OR] =2.8, 95% confidence interval [CI] 1.05-6.28), emergency caesarean section (OR=14.9, 95% CI 5.38-41.45) and primary postpartum haemorrhage (OR=5.4, 95% CI 1.79-4.35).
  
  
  CONCLUSIONS
  Women of black race, those delivered by emergency caesarean section and those with primary postpartum haemorrhage are more likely to be admitted to the ICU.
authors.affiliation: Department of Obstetrics and Gynaecology, Royal Free Hospital, Pond Street, London, NW3 2QG, UK. Dseloojeme@aol.com
authors.forename: Daniel O
authors.initials: DO
authors.lastname: Selo-Ojeme
authors.forename: Monica
authors.initials: M
authors.lastname: Omosaiye
authors.forename: Parijat
authors.initials: P
authors.lastname: Battacharjee
authors.forename: Rezan A
authors.initials: RA
authors.lastname: Kadir
mesh_terms: D000328:Adult; D000367:Age Factors; D016022:Case-Control Studies; D002585:Cesarean Section; D003422:Critical Care / Q000706:statistics & numerical data; D036861:Delivery, Obstetric / Q000379:methods; D004632:Emergency Medical Services / Q000592:standards / Q000706:statistics & numerical data; D005260:Female; D006761:Hospitals; D006801:Humans; D007362:Intensive Care Units / Q000706:statistics & numerical data*; D007902:Length of Stay; D008131:London; D010298:Parity; D010343:Patient Admission / Q000706:statistics & numerical data*; D049590:Postpartum Period; D011247:Pregnancy; D012189:Retrospective Studies; D012307:Risk Factors; D012737:Sex Factors