title: Medicaid and preterm births in Virginia: an analysis of recent outcomes.
abstract: OBJECTIVE
  The study objectives were to evaluate adequacy of prenatal care and risk for preterm birth among Medicaid clients in Virginia and to determine if payment method is associated with the risk of preterm birth.
  
  
  METHODS
  Birth certificate data for the Commonwealth of Virginia for 2007 and 2008 were linked with Medicaid claims data. Analysis was limited to singleton births. Three payment methods were evaluated: private insurance, self-pay, and Medicaid. The prevalence of preterm birth for each level of prenatal care defined by the Kotelchuck prenatal care index was assessed for each payment method. Unconditional logistic regression modeling was used to assess the association between payment method and preterm birth risk while controlling for known preterm birth risk factors.
  
  
  RESULTS
  Preterm birth prevalences (95% confidence interval [CI]) for the different payment methods were 7.9% (4.79-8.07) for the privately insured, 10.1% (9.57-10.60) for the self-pay group, and 10.2% (9.95-10.45) for Medicaid recipients. Compared with those with private insurance, women on Medicaid had an adjusted odds ratio (OR) for preterm birth (95% CI) of 0.99 (0.94-1.03). Self-pay mothers had a 32% increase in the odds of preterm birth relative to the privately insured. All payment groups show a trend toward significant reduction in preterm birth prevalence as adequacy of prenatal care improved from inadequate to adequate. Medicaid enrollees had a high prevalence of known risk factors, including smoking and illicit drug use and cervical insufficiency.
  
  
  CONCLUSIONS
  When known risk factors have been controlled, preterm birth risk for Medicaid enrollees did not differ significantly from the privately insured.
authors.affiliation: Department of Obstetrics & Gynecology and Institute on Women's Health, Virginia Commonwealth University, Richmond, Virginia, USA.
authors.forename: Emmanuel A
authors.initials: EA
authors.lastname: Anum
authors.forename: Sheldon M
authors.initials: SM
authors.lastname: Retchin
authors.forename: Sheryl L
authors.initials: SL
authors.lastname: Garland
authors.forename: Jerome F
authors.initials: JF
authors.lastname: Strauss
mesh_terms: D000293:Adolescent; D000328:Adult; D005260:Female; D006801:Humans; D007348:Insurance, Health; D008484:Medicaid; D011247:Pregnancy; D011256:Pregnancy Outcome / Q000453:epidemiology*; D047928:Premature Birth / Q000453:epidemiology*; D011295:Prenatal Care / Q000592:standards* / Q000706:statistics & numerical data; D014481:United States; D014768:Virginia / Q000453:epidemiology; D055815:Young Adult