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Kerstin Berntorp

Kerstin Berntorp

Adjunct professor

Kerstin Berntorp

Glucose homeostasis, beta cell function, and insulin resistance in relation to vitamin D status after gestational diabetes mellitus


  • Nael Shaat
  • Claes Ignell
  • Anastasia Katsarou
  • Kerstin Berntorp

Summary, in English

Introduction: We wanted to determine vitamin D status after gestational diabetes mellitus (GDM) and to evaluate whether levels of 25-hydroxyvitamin D3 (25OHD3) are associated with beta cell function, insulin resistance or a diagnosis of diabetes after GDM. Material and methods: Glucose homeostasis was assessed during a 75-g oral glucose tolerance test one to two years after delivery in 376 women with previous GDM (287 European and 78 non-European, including 33 Arab and 35 Asian women). Insulin resistance was estimated using homeostasis model assessment of insulin resistance (HOMA-IR). The insulinogenic index (I/G30) and the disposition index [(I/G30)/HOMA-IR] were used to calculate insulin secretion. Concentrations of serum 25OHD3 were determined. Results: Mean (±SD) 25OHD3 concentration was 50.0 ± 22.3 nmol/L and differed significantly among subgroups of body mass index, ethnicity, and glucose tolerance status; 53% had 25OHD3 levels <50 nmol/L and 87% had 25OHD3 levels <75 nmol/L. There was a negative correlation between 25OHD3 concentration and HOMA-IR (p < 0.001) and a positive correlation between 25OHD3 and disposition index (p = 0.002) in univariable regression analysis. Correlations attenuated after adjustment for body mass index. In univariable regression analysis, 25OHD3 concentrations were significantly associated with diabetes after GDM (p = 0.004). However, in a multivariable model, non-European origin, HOMA-IR and insulinogenic index were significantly associated with postpartum diabetes, whereas 25OHD3 concentrations were not. Conclusion: Vitamin D deficiency/insufficiency in previous GDM cases appears to be associated with beta cell dysfunction and insulin resistance, but not with postpartum diabetes when factors well known to influence type-2 diabetes were adjusted for.


  • Genomics, Diabetes and Endocrinology
  • Clinical Sciences, Helsingborg
  • Diabetes and Celiac Unit

Publishing year







Acta Obstetricia et Gynecologica Scandinavica





Document type

Journal article




  • Endocrinology and Diabetes


  • Disposition index
  • Ethnicity
  • Gestational diabetes
  • Insulinogenic index
  • OGTT
  • Postpartum diabetes
  • Vitamin D



Research group

  • Genomics, Diabetes and Endocrinology
  • Diabetes and Celiac Unit


  • ISSN: 0001-6349