Hypovitaminosis D is Associated with Gestational Diabetes Mellitus

Abstract

Introduction: Vitamin D deficiency has been shown to cause expression of insulin gene resulting in high insulin synthesis and secretion. It also decreases insulin resistance, thus affecting abnormal glucose metabolism and diabetes. Aim: To estimate total 25-hydroxy vitamin D levels in pregnant women and to find its association with Gestational Diabetes Mellitus (GDM). Materials and Methods: Fifty-four antenatal women were randomly enrolled at 24-28 weeks gestation after conforming to exclusion criteria. Serum vitamin D, two-hour 75 grams glucose and postprandial plasma glucose levels were estimated in all women at the time of enrollment. GDM was diagnosed with plasma glucose level >140 mg/dL (Group A). Rest of the women constituted Group B or control group. They were followed up till delivery. Vitamin D status and fetomaternal outcome was evaluated. Results: Hypovitaminosis D was found in 93% of women. There were 38.8% women (n=21) in GDM group compared to 61.2% (n=33) in control group. Vitamin D was significantly low in Group A than B (p-value 0.004). None of the women in Group A had vitamin D levels of 10 ng/mL and above compared to 37.2% in Group B. Severe vitamin D deficient women (levels <5 ng/ mL) had a risk ratio of 5.647 for developing GDM. A negative correlation was observed between vitamin D levels and plasma glucose levels. Conclusion: Hypovitaminosis D was associated with development of GDM.

Keywords

• Modifiable risk factors
• Plasma glucose levels
• Vitamin D deficiency