Table 1 Prevalence of vitamin D concentration and levels by sex, age group and season.

From: Assessment of serum vitamin D levels in children aged 0–17 years old in a Chinese population: a comprehensive study

 

Median(IQR:ng/mL)

                                                                                  Vitamin D group

P1

Deficiency

n = 2380

Insufficient

n = 3454

Sufficiency

n = 5282

P2

  

n

%

n

%

n

%

 

Gender

Boy

29.72

(21.84–39.84)

 

1281

20.2%

1942

30.6%

3125

49.2%

 

Girl

28.48

(20.65–39.23)

 < 0.001

1099

23.0%

1512

31.7%

2157

45.2%

 < 0.001

Age

 < 1

37.36

(28.89–48.00)

 

222

5.2%

1010

23.5%

3073

71.4%

 

1–3

32.33

(24.70–42.08)

 

247

12.9%

562

29.3%

1106

57.8%

 

3–6

25.41

(19.27–32.59)

 

532

27.5%

768

39.7%

633

32.7%

 

6–12

20.92

(16.22–27.05)

 

1269

45.7%

1049

37.8%

460

16.6%

 

12–17

19.18

(15.31–23.57)

 < 0.001

110

59.5%

65

35.1%

10

5.4%

 < 0.001

Season

Spring

29.02

(20.73–39.72)

 

546

23.3%

705

30.1%

1092

46.6%

 

Summer

28.79

(21.53–39.37)

 

725

20.3%

1195

33.4%

1656

46.3%

 

Autumn

30.12

(22.00–39.70)

 

623

19.2%

991

30.5%

1636

50.3%

 

Winter

28.58

(19.97–39.46)

 < 0.001

486

25.0%

563

28.9%

898

46.1%

 < 0.001

  1. P1: The Mann–Whitney U rank-sum test was utilized for sex. The Kruskal–Wallis H test was applied for age and season.
  2. P2: Chi-square test.
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