Changes in Vitamin D Status in Overweight Middle-Aged Adults with or without Impaired Glucose Metabolism in Two Consecutive Nordic Summers
Table 2
Measures of glucose metabolism and body composition at baseline and their relationship (Pearson correlation coefficients) with vitamin D at baseline and its seasonal change during summer.
Variable
Mean values (SD)
Vitamin D before summer
Seasonal change in vitamin D
OGTT (mmol/L)
5.86 (1.08)
0.04 ()
0.02 ()
OGTT 2 h mean (mmol/L)
9.36 (3.76)
–0.01 ()
0.02 ()
Insulin‡
56.29 (38.09)
–0.07 ()
–0.03 ()
HbA1c (mmol/L)
5.00 (0.73)
–0.00 ()
–0.00 ()
Fat mass (%)†
39.51 (8.15)
–0.10 ()
–0.15()
Fat mass (kg)†
33.32 (8.71)
–0.21 ()
–0.08 ()
Fat mass index (kg·m−2)†
11.46 (3.36)
–0.18 ()
–0.08 ()
Fat-free mass (kg)†
51.04 (10.11)
0.07 ()
0.14 ()
Fat-free mass index (kg·m−2)†
17.18 (20.03)
0.10 ()
0.21 ()
Weight (kg)
84.36 (12.03)
–0.21 ()
0.06 ()
Waist (cm)†
97.42 (10.60)
–0.17 ()
–0.02 ()
Hip (cm)†
104.42 (7.37)
–0.24 ()
–0.07 ()
BMI (kg·m−2)
28.87 (3.61)
–0.20 ()
0.03 ()
Age (y)
60.30 (4.88)
0.08 ()
–0.09 ()
Height (cm)
171.10 (9.08)
–0.05 ()
Fish intake
1.90 (0.72)
0.12 ()
Supplementation of vitamin D
64.20 (20.11)
0.16 ()
–0.11 ()
Abbreviations: HbA1c, glycated haemoglobin; OGTT, oral glucose tolerance test. N = 158 if not otherwise stated; ,.
