Skip to main content

Table 1 Baseline clinical characteristics

From: Dose and time responses of vitamin D biomarkers to monthly vitamin D3 supplementation in overweight/obese African Americans with suboptimal vitamin d status: a placebo controlled randomized clinical trial

Variable

Study groups

P-value

 

Placebo (n = 17)

600 IU/day (n = 17)

2000 IU/day (n = 18)

4000 IU/day (n = 18)

 

Age (years)

27.78 ± 2.6

26.19 ± 2.5

24.38 ± 2.0

25.51 ± 2.2

0.77

Male/Femalea

4/12

2/13

3/14

2/15

0.76

Height (cm)

164.28 ± 2.1

164.60 ± 2.0

163.84 ± 2.4

164.20 ± 1.7

0.99

Weight (kg)

98.42 ± 6.7

93.39 ± 3.7

99.16 ± 5.0

92.77 ± 4.8

0.74

BMI (kg/m2)

36.19 ± 2.0

34.56 ± 1.4

37.08 ± 1.9

34.42 ± 1.7

0.66

Serum 25(OH)D (ng/mL)

15.88 ± 1.4

14.00 ± 0.8

15.93 ± 1.0

13.25 ± 1.0

0.21

Plasma iPTH (pg/mL)#

47.32 ± 3.6

59.60 ± 7.8

50.60 ± 4.2

62.00 ± 8.8

0.32

Plasma 1,25(OH)2D (pg/mL)

34.04 ± 1.9

37.40 ± 1.8

35.18 ± 2.3

32.70 ± 1.1

0.46

Plasma FGF-23 (pg/mL)#

6.53 ± 0.9

6.92 ± 0.8

8.57 ± 1.6

6.57 ± 0.9

0.81

Plasma Phosphorus (mg/dL)#

3.74 ± 0.2

4.01 ± 0.3

3.61 ± 0.1

3.80 ± 0.1

0.71

Urine Ca/Cr ratio

0.08 ± 0.05

0.05 ± 0.03

0.10 ± 0.05

0.08 ± 0.05

0.09

  1. Values are presented as mean ± s.e.m
  2. BMI Body mass index, 25(OH)D Serum 25-hydroxyvitamin D, Plasma 1,25(OH) 2 D 1,25-dihydroxyvitamin D, iPTH Intact parathyroid hormone, FGF-23 Fibroblast Growth Factor-23, Ca/Cr Calcium/creatinine ratio
  3. aGroup differences analyzed using chi-square test
  4. #Group differences analyzed using Kruskal-Wallis test