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Table 2 Vitamin D status according to different characteristics of the study population

From: Factors associated to serum 25-hydroxyvitamin D levels among older adult populations in urban and suburban communities in Shanghai, China

 

Vitamin D concentrations

P value

Median

P25

P75

Sex

Male

22.73

17.63

28.92

<0.0001

Female

19.99

15.38

25.62

 

Age a

Q1

21.92

16.29

27.55

0.0006

Q2

21.18

16.39

27.26

 

Q3

21.07

16.44

27.15

 

Q4

20.52

15.24

26.76

 

Education level

Primary education

22.17

16.77

29.41

<0.0001

Middle education

20.67

15.90

26.29

 

College or above

21.04

16.16

26.35

 

Under primary

20.40

15.92

26.47

 

Physical exercise

Never

20.01

14.95

27.15

<0.0001

Low

20.76

16.04

26.25

 

High

21.70

16.78

27.64

 

Alcohol consumption

Never

20.64

15.84

26.51

<0.0001

< 3 drink/week

22.76

17.54

29.74

 

≥ 3 drink/week

24.23

18.86

31.23

 

Cigarette smoking

Never

20.66

15.93

26.55

<0.0001

Ex-smoker

23.16

17.68

29.82

 

Current smoker

22.67

17.06

29.49

 

Milk consumption

No

21.16

16.32

27.32

0.1909

< 250 ml/day

20.74

15.90

26.93

 

≥ 250 ml/day

21.43

16.40

26.80

 

Calcium or vitamin D supplements

No

20.59

15.74

26.33

<0.0001

Yes

23.57

18.20

29.93

 

BMI b

Q1

21.42

16.03

28.72

0.0012

Q2

21.59

16.60

27.25

 

Q3

20.83

16.18

26.75

 

Q4

20.45

15.68

25.69

 

Community

urban

20.16

15.44

25.65

<0.0001

suburb

22.75

17.94

29.77

 
  1. a age: Q1: < 68 yr.; Q2: 68-71 yr.; Q3: 72-77 yr.; Q4: ≥ 78 yr
  2. b BMI (Kg/m 2 ): Q1: < 21.76; Q2: 21.76–23.77; Q3: 23.77–25.99; Q4: ≥ 25.99