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Table 1 Baseline demographic and biochemical indices of T2DM cases and control subjects according to their vitamin D status

From: Does vitamin D play a significant role in type 2 diabetes?

Parameters (T = 912) T2DM Cases (N = 429) Non-diabetic Controls (N = 483)
Serum 25OHD
<20 ng/ml
Serum 25OHD
≥20 ng/ml
p value Serum 25OHD
<20 ng/ml
Serum 25OHD
≥20 ng/ml
p value
Mean ± SD Mean ± SD Mean ± SD Mean ± SD
(n = 392) (n = 37) (n = 449) (n = 34)
Anthropometric indices
Age (Years) 56.37 ± 10.34 57.79 ± 12.19 0.44 48.36 ± 12.78 51.44 ± 13.51 0.18
BMI (Kg/m 2 ) 27.17 ± 5.14 26.50 ± 3.93 0.44 25.78 ± 4.54 26.68 ± 5.20 0.27
WC (cm) 96.99 ± 10.68 94.31 ± 9.21 0.14 92.10 ± 10.71 91.59 ± 10.61 0.78
WHR 0.94 ± 0.10 0. 93 ± 0.07 0.55 0.91 ± 0.07 0.89 ± 0.08 0.11
Duration of T2DM (Years) 8.30 ± 7.26 11.23 ± 10.55 0.03* - - -
Biochemical indices
FBS (mg/dl) 150.43 ± 64.51 138.80 ± 47.09 0.29 88.18 ± 12.11 87.88 ± 13.51 0.89
PPBS (mg/dl) 190.72 ± 70.50 187.42 ± 76.74 0.79 - - -
HbA1c (%) 8.36 ± 1.79 8. 26 ± 2.21 0.75 5.67 ± 0.49 5.67 ± 0.54 0.82
FI (uIU/ml) 11.29 ± 6.95 8.27 ± 4.17 0.01* 12.11 ± 5.45 10.00 ± 5.00 0.03*
HOMA-IR 3.93 ± 3.62 3.04 ± 2.24 0.04* 2.71 ± 1.60 2.20 ± 1.24 0.08
  1. By student’s t-test, *: Significant, SD: Standard deviation.
  2. BMI: Body mass index, WC: Waist circumference, WHR: Waist-Hip-Ratio.
  3. FBS: Fasting Blood Sugar, PPBS: Post-Prandial Blood Sugar, HbA1c: Glycated hemoglobin, FI: Fasting Insulin, HOMA-IR: Homeostasis Model of Assessment-Insulin Resistance Index.
  4. Vitamin D-Deficient: 25OHD <20ng/ml.
  5. Vitamin D-Non-deficient: 25OHD ≥20ng/ml.