title: Effect of betamethasone on maternal glucose.
abstract: OBJECTIVE
  To determine the effect of single and multiple betamethasone courses on maternal fasting and postprandial glucose values.
  
  
  METHODS
  A prospective cohort study was performed in women receiving betamethasone at 24-34 weeks' gestation. Fasting and 1-h postprandial capillary glucose values were obtained daily following betamethasone therapy for hospitalized patients. A control group comprised outpatients who underwent weekly fasting and postprandial assessments for 3 weeks. Fasting and 1-h postprandial capillary glucose values were compared between control and betamethasone patients using an unpaired t test.
  
  
  RESULTS
  Thirty-five women received a single course of therapy, 19 received multiple courses and 28 served as controls. Mean fasting glucose values for control patients fell within a narrow range of 81.6 +/- 10.3 to 82.2 +/- 6.4 mg/dl for weeks 1-3. Of women receiving betamethasone, 59% of fasting glucose values were greater than 90 mg/dl as compared to 16% of control fasting values (p < 0.00 1, chi2 test). Mean 1-h postprandial values for control women ranged from 107.7 +/- 15.1 to 112.3 +/- 20.0 mg/dl for weeks 1-3. Mean 1-h postprandial glucose values were < or = 140 mg/dl following one, two or three courses of betamethasone therapy.
  
  
  CONCLUSIONS
  Betamethasone resulted in an acute increase in fasting glucose following a single course of betamethasone, whereas two or more courses of therapy resulted in a continuous elevation of fasting glucose values. One-hour postprandial values were not clinically abnormal.
authors.affiliation: Division of Maternal-Fetal Medicine, Department of Obstetrics and Gynecology, Duke University Medical Center, Durham, North Carolina, USA.
authors.forename: S D
authors.initials: SD
authors.lastname: Shelton
authors.forename: K A
authors.initials: KA
authors.lastname: Boggess
authors.forename: T
authors.initials: T
authors.lastname: Smith
authors.forename: W N P
authors.initials: WN
authors.lastname: Herbert
mesh_terms: D000328:Adult; D001623:Betamethasone / Q000008:administration & dosage / Q000009:adverse effects*; D001786:Blood Glucose / Q000032:analysis*; D015331:Cohort Studies; D005215:Fasting; D005260:Female; D005322:Premature Rupture of Fetal Membranes / Q000188:drug therapy; D005502:Food; D005865:Gestational Age; D005938:Glucocorticoids / Q000008:administration & dosage / Q000009:adverse effects*; D006801:Humans; D007752:Obstetric Labor, Premature / Q000188:drug therapy; D011225:Pre-Eclampsia / Q000188:drug therapy; D011247:Pregnancy; D011446:Prospective Studies
chemical_list: D001786:Blood Glucose; D005938:Glucocorticoids; D001623:Betamethasone