Utilization and cost experience of low-income families in four prepaid group-practice plans.
D000368:Aged; D002140:California; D003365:Costs and Cost Analysis; D005191:Family Characteristics; D006123:Group Practice / Q000706:statistics & numerical data; D006761:Hospitals / Q000706:statistics & numerical data; D006801:Humans; D007348:Insurance, Health / Q000706:statistics & numerical data; D008489:Medical Indigency; D009518:New York; D010820:Physicians / Q000706:statistics & numerical data; D014481:United States; D014490:United States Office of Economic Opportunity; D014861:Washington