Research Article

Vitamin D Status in Women with Gestational Diabetes Mellitus during Pregnancy and Postpartum

Table 1

Characteristics of study subjects.

ParametersGDM ( = 47)Controls ( = 29)

Pregestational parameters
 Age (years)33 [28–35]31 [28–33]NS
 BMI (kg/m2)24.45 [22.68–28.91]21.11 [20.44–24.77]0.014
 History of previous GDM 12.8%0%0.0491
 Family history of DM78.7%17.2%0.0018
Midgestational parameters (24–30th weeks of gestation)
 FPG (mmol/L)4.8 [4.5–5.2]4.1 [4.0–4.4] <0.001
 1 hr after load glucose (mmol/L)9.2 [8.3–9.6]5.9 [5.3–6.5]<0.001
 2 hr after load glucose (mmol/L)8.0 [7.7–8.9]5.3 [4.8–5.8]<0.001
 BMI (kg/m2)27.16 [25.24–31.25]23.53 [22.72–29.00]0.019
 25(OH)D (nmol/L)28.5 [21.0–34.0]31.7 [24.0–40.0]NS
 25(OH)D < 50 nmol/L95.7%93.1%NS
Postpartum parameters (6 weeks–12 months after delivery)
 Weight gain during pregnancy (kg)8.0 [5.0–10.5]14.0 [11.0–17.0]<0.001
 Offspring birth weight (g)3060 [2750–3480]3400 [3100–3740]0.016
 Persisting glucose abnormality14.9%
 25(OH)D (nmol/L)47.5 [40.0–53.0]56.5 [48.0–69.0]0.0041
 25(OH)D < 50 nmol/L63.8%34.5%0.012

Data expressed as a median [IQR] or proportions. Differences evaluated by nonparametric Mann-Whitney or Fischer’s exact test, respectively.