title: Trends in pregnancy hospitalizations that included a stroke in the United States from 1994 to 2007: reasons for concern?
abstract: OBJECTIVE
  Stroke is an important contributor to maternal morbidity and mortality, but there are no recent data on trends in pregnancy-related hospitalizations that have involved a stroke. This report describes stroke hospitalizations for women in the antenatal, delivery, and postpartum periods from 1994 to 1995 to 2006 to 2007 and analyzes the changes in these hospitalizations over time.
  
  
  METHODS
  Hospital discharge data were obtained from the Nationwide Inpatient Sample, developed as part of the Healthcare Cost and Utilization Project sponsored by the Agency for Healthcare Research and Quality. Pregnancy-related hospitalizations with stroke were identified according to the International Classification of Diseases, Ninth Revision. All statistical analyses accounted for the complex sampling design of the data source.
  
  
  RESULTS
  Between 1994 to 1995 and 2006 to 2007, the rate of any stroke (subarachnoid hemorrhage, intracerebral hemorrhage, ischemic stroke, transient ischemic attack, cerebral venous thrombosis, or unspecified) among antenatal hospitalizations increased by 47% (from 0.15 to 0.22 per 1000 deliveries) and among postpartum hospitalizations by 83% (from 0.12 to 0.22 per 1000 deliveries) while remaining unchanged at 0.27 for delivery hospitalizations. In 2006 to 2007, ≈32% and 53% of antenatal and postpartum hospitalizations with stroke, respectively, had concurrent hypertensive disorders or heart disease. Changes in the prevalence of these 2 conditions from 1994 to 1995 to 2006 to 2007 explained almost all of the increase in postpartum hospitalizations with stroke during the same period.
  
  
  CONCLUSIONS
  Our results have demonstrated an increasing trend in the rate of pregnancy-related hospitalizations with stroke in the United States, especially during the postpartum period, from 1994 to 1995 to 2006 to 2007.
authors.affiliation: Centers for Disease Control and Prevention, 4770 Buford Highway NE, Mailstop K-37, Atlanta, GA 30341-3724, USA. ekuklina@cdc.gov
authors.forename: Elena V
authors.initials: EV
authors.lastname: Kuklina
authors.forename: Xin
authors.initials: X
authors.lastname: Tong
authors.forename: Pooja
authors.initials: P
authors.lastname: Bansil
authors.forename: Mary G
authors.initials: MG
authors.lastname: George
authors.forename: William M
authors.initials: WM
authors.lastname: Callaghan
mesh_terms: D000328:Adult; D016208:Databases, Factual; D005260:Female; D006760:Hospitalization / Q000639:trends*; D006801:Humans; D049590:Postpartum Period; D011247:Pregnancy; D011249:Pregnancy Complications, Cardiovascular / Q000453:epidemiology* / Q000628:therapy; D015995:Prevalence; D012189:Retrospective Studies; D020521:Stroke / Q000453:epidemiology* / Q000628:therapy; D014481:United States / Q000453:epidemiology