title: Trends in cesarean section use in California, 1983 to 1990.
abstract: OBJECTIVE
  Our aim was to assess recent trends in cesarean section use in California.
  
  
  METHODS
  California discharge abstract data on hospital deliveries in 1983 through 1990 (379,759 to 587,508 annual deliveries) were used to analyze time trends by indication, age, race, and payment source.
  
  
  RESULTS
  California cesarean section rates increased annually from 21.8% in 1983 to 25.0% in 1987 and then decreased to 22.7% by 1990. Similar patterns were noted for all age and race or ethnicity groups. Primary cesarean section rates increased from 15.2% in 1983 to 17.9% in 1987, then decreased to 16.2% by 1990. Declines in repeat cesarean section rates continued throughout 1983 through 1990, accelerating after 1987. For both primary and repeat cesarean section rates, time trends after mid-1987 were significantly different than those for 1983 to 1987.
  
  
  CONCLUSIONS
  After increasing from 1983 to 1987, California cesarean section rates declined from 1988 to 1990. Existing payment source differences in cesarean section use increased in magnitude from 1983 to 1990, with privately insured women consistently having the highest cesarean section rates.
authors: School of Medicine, University of California, San Francisco.
authors: R S
authors: RS
authors: Stafford
authors: S D
authors: SD
authors: Sullivan
authors: L B
authors: LB
authors: Gardner
mesh_terms: D002140:California; D002585:Cesarean Section / Q000706:statistics & numerical data* / Q000639:trends*; D005260:Female; D006801:Humans; D008423:Maternal Age; D011247:Pregnancy; D044469:Racial Groups; D012044:Regression Analysis; D012051:Reimbursement Mechanisms; D012086:Reoperation