A Population-Based Model to Consider the Effect of Seasonal Variation on Serum 25(OH)D and Vitamin D Status
Table 1
Participants’ characteristics for CoLaus and Bus Santé studies.
CoLaus study
Bus Santé study ()
value1
value2
value3
Participants with vitamin D supplementation excluded ()
Participants with vitamin D supplementation ()
Participants with and without vitamin D supplementation ()
Age, mean (SD)
49.77 (8.54)
55.97 (7.30)
49.96 (8.57)
53.94 (6.73)
<0.001
<0.001
<0.001
Male gender, (%)
2421 (49.3)
15 (9.7)
2436 (48.1)
1165 (45.9)
<0.001
0.006
0.075
Height, cm, mean (SD)
169.27 (9.26)
164.59 (7.52)
169.13 (9.24)
168.66 (9.40)
<0.001
0.008
0.041
Weight, kg, mean (SD)
73.59 (14.19)
64.73 (11.96)
73.32 (14.21)
72.30 (14.09)
<0.001
<0.001
0.003
BMI, kg/m2, mean (SD)
25.61 (4.12)
23.85 (3.67)
25.56 (4.12)
25.32 (3.94)
<0.001
0.003
0.015
25(OH)D, nmol/L, mean (SD)
47.58 (22.10)
66.05 (21.02)
48.14 (22.29)
48.62 (23.75)
<0.001
0.061
0.389
25(OH)D < 50 nmol/L, (%)
2827 (57.5)
35 (22.7)
2862 (56.5)
1442 (56.8)
<0.001
0.555
0.775
25(OH)D 50–75 nmol/L, (%)
1528 (31.1)
64 (41.6)
1592 (31.4)
776 (30.6)
0.006
0.645
0.457
value comparing CoLaus study participants with and without vitamin D supplementation. value comparing CoLaus study participants without vitamin D supplementation and Bus Santé. value comparing CoLaus study (participants with and without vitamin D supplementation) and Bus Santé. Based on corrected 25(OH)D values.
