title: Comparing maternal and perinatal outcomes in pregnancies complicated by preeclampsia superimposed chronic hypertension and preeclampsia alone.
abstract: OBJECTIVE
  The study was to determine whether preeclampsia with superimposed chronic hypertension results in worse maternal and perinatal outcomes than preeclampsia alone.
  
  
  METHODS
  A retrospective study involving 850 pregnant women was conducted and divided into two groups: preeclampsia superimposed on chronic hypertension (group A, n = 84) and preeclampsia alone (group B, n = 766). The maternal and fetal outcomes of all subjects were collected and analyzed.
  
  
  RESULTS
  There were no significant differences between the two groups in baseline information. However, the systolic and diastolic blood pressures in group A were significantly higher than those in group B (p < 0.05). The average interval between the onset of preeclampsia and the termination of pregnancy was significantly longer in group A as compared to group B. The incidence of serious maternal complications showed no differences between the two groups (p > 0.05). It showed a higher rate of neonatal respiratory distress syndrome and intracranial hemorrhage in group A than in group B (p < 0.05).
  
  
  CONCLUSIONS
  Women in group A had higher risks of maternal and perinatal outcomes as compared to women in group B.
authors.forename: W S
authors.initials: WS
authors.lastname: Hu
authors.forename: Y
authors.initials: Y
authors.lastname: Feng
authors.forename: M Y
authors.initials: MY
authors.lastname: Dong
authors.forename: J
authors.initials: J
authors.lastname: He
mesh_terms: D000037:Abruptio Placentae / Q000453:epidemiology; D000328:Adult; D015331:Cohort Studies; D015897:Comorbidity; D004461:Eclampsia / Q000453:epidemiology; D005260:Female; D005333:Fetus; D017359:HELLP Syndrome / Q000453:epidemiology; D006801:Humans; D006973:Hypertension / Q000453:epidemiology*; D007231:Infant, Newborn; D006473:Postpartum Hemorrhage / Q000453:epidemiology; D011225:Pre-Eclampsia / Q000453:epidemiology*; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology; D011256:Pregnancy Outcome / Q000453:epidemiology*; D012127:Respiratory Distress Syndrome, Newborn / Q000453:epidemiology*; D012189:Retrospective Studies; D012720:Severity of Illness Index