title: Frequency of Vitamin D deficiency in pregnant diabetics at Baskent University Hospital, Istanbul.
abstract: OBJECTIVE
  To find out the frequency of vitamin D deficiency and its relation with glucose parameters and the incidence of gestational diabetes (GDM).
  
  
  METHODS
  Gestational diabetes was diagnosed with 75 gram oral glucose tolerance test. Forty-four pregnant women diagnosed with GDM and 78 non-GDM pregnant women were enrolled as case and control group, respectively in this descriptive study. Vitamin D status was classified as deficiency at ≤20 ng/ml for serum 25(OH)D concentrations.
  
  
  RESULTS
  The mean ages were 33.4±5.2 (18-44) years and 29.7±4.1 (21-39) years, mean BMI was 30.6±5.9 kg/m² (19.5-46.1) and 25.9±4.4 kg/m2 (16.5-38) in case and control groups, respectively. The frequency of GDM was found 9.38%. The mean serum vitamin D levels in GDM group were significantly lower than in non-GDM subjects (p=0.07). A total of 56.8% of GDM patients were compared with 35.8% of control group which had Vitamin D deficiency and the difference was significant (p= 0.02). There was no significant association between vitamin D levels and fasting glucose, insulin and HbA1c. Vitamin D levels were inversely correlated with clothing style, parathyroid hormone levels, dental problems and muscle cramps.
  
  
  CONCLUSIONS
  The association of maternal Vitamin D status with the markers of glucose metabolism in pregnancy needs prospective studies.
authors.affiliation: Hulya Parildar, MD, Department of Family Medicine, Baskent University, Istanbul Hospital, Mahir Iz caddesi No: 53 Altunizade/Uskudar,Istanbul, Turkey.
authors.forename: Hulya
authors.initials: H
authors.lastname: Parildar
authors.affiliation: Asli Dogruk Unal, MD, Department of Endocrinology and Metabolism, Baskent University, Istanbul Hospital, Oymaci Sokak No: 7 Altunizade/Uskudar, Istanbul, Turkey.
authors.forename: Asli
authors.initials: A
authors.lastname: Dogruk Unal
authors.affiliation: Guldeniz Aksan Desteli, MD, Department of Gynecology and Obstetrics, Baskent University, Istanbul Hospital, Oymaci Sokak No:7 Altunizade/Uskudar Istanbul, Turkey.
authors.forename: Guldeniz
authors.initials: G
authors.lastname: Aksan Desteli
authors.affiliation: Ozlem Cigerli, MD, Department of Family Medicine, Baskent University, Istanbul Hospital, Mahir Iz caddesi No: 53 Altunizade/Uskudar,Istanbul, Turkey.
authors.forename: Ozlem
authors.initials: O
authors.lastname: Cigerli
authors.affiliation: Nilgun Guvener Demirag, MD, Department of Endocrinology and Metabolism, Baskent University, Istanbul Hospital, Oymaci Sokak No: 7 Altunizade/Uskudar, Istanbul, Turkey.
authors.forename: Nilgun
authors.initials: N
authors.lastname: Guvener Demirag
keywords: Gestational diabetes; Nutrition in pregnancy; Vitamin D