title: Utilization of health care services of pregnant women complicated by preeclampsia in Ontario.
abstract: OBJECTIVE
  To assess the utilization of health care services by pregnant women affected by preeclampsia (PE).
  
  
  METHODS
  Population-based study.
  
  
  METHODS
  Perinatal partnership hospitals in Ontario.
  
  
  METHODS
  Obstetric deliveries in 2005 Canadian province of Ontario (about 95% of births).
  
  
  METHODS
  For each PE case, four subjects without PE matched by age, parity, plurality, and hospital at childbirth were chosen as the controls. We compared the utilization of intra-partum care services and infant outcomes between the two groups. We also estimated the extra costs to the health care system in Ontario for caesarean delivery and caring of extremely low birth weight infants attributable to PE during the neonatal period and in the first 2 years of life.
  
  
  METHODS
  Cesarean delivery, hospital stay, extremely low birth weight infants, cost.
  
  
  RESULTS
  Of the 120,611 obstetric deliveries included in this analysis, 1240 (1.3%) were diagnosed with PE. Patients with PE and matched controls were similar in maternal age, parity, and other demographic characteristics. Compared with study subjects without PE, those with PE had increased uses of spinal anesthesia, maternal transfer, Cesarean delivery, labour induction, neonatal transfer, newborn resuscitation, longer hospital stay for childbirth, and higher rates of preterm births and low birth weight. The extra costs to the health care system for cesarean delivery and caring of extremely low-birth-weight infants attributable to PE during the neonatal period and in the first 2 years of life in Ontario were $0.5 millions, 3.1 millions, and $5.1 million per year, respectively, if we use the reported PE rate in this database.
  
  
  CONCLUSIONS
  PE is associated with substantially increased costs to the health care system.
authors.affiliation: School of Public Health, Central South University, Hunan, Peoples' Republic of China.
authors.forename: Aizhong
authors.initials: A
authors.lastname: Liu
authors.forename: Shi Wu
authors.initials: SW
authors.lastname: Wen
authors.forename: Jim
authors.initials: J
authors.lastname: Bottomley
authors.forename: Mark C
authors.initials: MC
authors.lastname: Walker
authors.forename: Graeme
authors.initials: G
authors.lastname: Smith
mesh_terms: D000328:Adult; D005260:Female; D006801:Humans; D009864:Ontario; D011225:Pre-Eclampsia / Q000191:economics*; D011247:Pregnancy; D034121:Reproductive Health Services / Q000706:statistics & numerical data*; D012189:Retrospective Studies; D055815:Young Adult