title: Improvements in diabetes management and outcomes in a Medicaid managed care system.
abstract: OBJECTIVE
  To determine the impact of managed care on effectiveness of diabetes management in Tennessee, where a statewide Medicaid program (TennCare) delivers services through capitated managed care organizations (MCOs).
  
  
  METHODS
  This retrospective cohort study documented the health care utilization experiences and clinical outcomes of a convenience sample of Tennessee Medicaid enrollees with chronic diabetes before and after the initiation of TennCare. Exposures to recommended diabetic services and outcomes were compared before and after TennCare for 171 enrollees with diabetes in the state's largest academic MCO who met age, continuous enrollment, insurance, and diagnostic criteria for two years before (1992 and 1993) and two years after TennCare (1995 and 1996). Claims data were used to assess baseline characteristics and chart review data were used to assess health services utilization for 71% of cohort members (n = 121) for whom complete medical records were available. The paired t-test was used to compare exposures and outcomes before and after TennCare.
  
  
  RESULTS
  Participants had an average of 6.4 outpatient clinic visits per year before TennCare vs. 8.2 visits per year after TennCare (P = .0009), 0.6 vs. 1.0 diabetic eye examinations (P = .0042), 0.2 vs. 0.5 foot examinations (P = .0358), 0.4 vs. 0.6 cholesterol assessments (P < .0001), and 0.5 vs. 1.0 glycosylated hemoglobin assessments annually (P < .0001). Average glycosylated hemoglobin decreased from 10.3 to 8.2 (P < .0001). Although hospitalizations and hospital days increased overall, there was no increase in emergency visits, preventable emergency visits, or preventable hospitalizations.
  
  
  CONCLUSIONS
  Enrollees with diabetes experienced increases in utilization of recommended health services and improved glucose control following the initiation of Medicaid managed care. These improvements may reflect improved chronic disease care in a primary care gatekeeper system.
authors.affiliation: University of Tennessee Health Science Center, Departments of Medicine and Preventive Medicine, 66 N. Pauline, Suite 633, Memphis, TN 38105, USA.
authors.forename: J E
authors.initials: JE
authors.lastname: Bailey
authors.forename: R J
authors.initials: RJ
authors.lastname: Womeodu
authors.forename: J Y
authors.initials: JY
authors.lastname: Wan
authors.forename: D L
authors.initials: DL
authors.lastname: Van Brunt
authors.forename: G W
authors.initials: GW
authors.lastname: Somes
mesh_terms: D000328:Adult; D003920:Diabetes Mellitus / Q000628:therapy*; D019468:Disease Management; D005260:Female; D006296:Health Services / Q000706:statistics & numerical data; D006801:Humans; D008297:Male; D008329:Managed Care Programs; D008484:Medicaid; D008875:Middle Aged; D010043:Outcome and Process Assessment, Health Care; D012189:Retrospective Studies; D013714:Tennessee; D014481:United States