title: Pregnancy-associated hospitalizations in the United States, 1999-2000.
abstract: OBJECTIVE
  The purpose of this study was to examine nondelivery, pregnancy-associated hospitalizations in the United States and the factors associated with them.
  
  
  METHODS
  Population-based nondelivery hospitalizations during pregnancy were obtained from the 1999 and 2000 National Hospital Discharge Survey. Ratios of hospitalizations per 100 deliveries were calculated and analyzed by age, race, and payment source.
  
  
  RESULTS
  The pregnancy-associated hospitalization ratio for 1999 through 2000 was 12.8 per 100 deliveries (95% CI, 11.8-13.8). Hospitalizations were highest among young women, African American women, and women without private insurance. Preterm labor, nausea and/or vomiting, and genitourinary complications accounted for one half of antenatal hospitalizations.
  
  
  CONCLUSIONS
  Pregnancy-associated hospitalizations declined during the 1990s. This may represent a decline in maternal morbidity or a change in management of pregnancy complications. Future research should be expanded to assess trends in morbidity treated in settings outside of hospitals.
authors.affiliation: Division of Reproductive Health, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA, USA. sbacak@cdc.gov
authors.forename: Stephen J
authors.initials: SJ
authors.lastname: Bacak
authors.forename: William M
authors.initials: WM
authors.lastname: Callaghan
authors.forename: Patricia M
authors.initials: PM
authors.lastname: Dietz
authors.forename: Chadd
authors.initials: C
authors.lastname: Crouse
mesh_terms: D000328:Adult; D005260:Female; D006760:Hospitalization / Q000706:statistics & numerical data*; D006801:Humans; D007902:Length of Stay; D008875:Middle Aged; D011247:Pregnancy; D011248:Pregnancy Complications / Q000453:epidemiology*; D013997:Time Factors; D014481:United States / Q000453:epidemiology