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Table 1 Characteristics of all subjects

From: Serum parathyroid hormone is related to genetic variation in vitamin D binding protein with respect to total, free, and bioavailable 25-hydroxyvitamin D in middle-aged Caucasians – a cross-sectional study

Variable

N = 622

Men (%)

32

Women (%)

68

Age (years)

42

±

3

Height (cm)

1.70

±

0.1

Weight (kg)

76

±

14

Body mass index (kg/m2)

26.2

±

4.3

Calcium intake (mg/day)

1253

±

530

Vitamin D intake (μg)

15.1

±

13

S-25(OH)D (nmol/L)

55.7

±

19.2

Free 25(OH)D (pmol/L)

12.2

±

4.9

Bioavailable 25(OH)D (nmol/L)

4.80

±

2.0

S-PTH (ng/L)

54.6

±

25

S-DBP (mg/L)

368

±

88

S-Albumin (g/L)

43.7

±

3.0

All physical activity (min/week)

481

±

372

History of regular smokinga (%)

46

Current Smokers:

Cigarettes per day

 1–5

17 %

 6 or more

83 %

  1. Values are presented as mean ± SD
  2. aat least one cigarette per day for 6 months