Table 2 Association of variables with the 25(OH)D concentration (categorical variable).

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

Variable

Deficiency

Insufficient

Sufficiency

n

%

(95% CI)

P

n

%

(95%CI)

P

n

%

Gender

Boy

1281

53.82%

0.729 (0.650–0.817)

 < 0.001

1942

56.22%

0.837 (0.763–0.918)

 < 0001

3125

59.16%

Girl

1099

46.18%

REF

 

1512

43.78%

REF

 

2157

40.84%

Age

 < 1

222

9.33%

0.005 (0.002–0.009)

 < 0.001

1010

29.24%

0.046 (0.023–0.090)

 < 0.001

3073

58.18%

1–3

247

10.38%

0.016 (0.008–0.031)

 < 0.001

562

16.27%

0.073 (0.037–0.142)

 < 0.001

1106

20.94%

3–6

532

22.35%

0.064 (0.033–0.125)

 < 0.001

768

22.24%

0.177 (0.090–0.347)

 < 0.001

633

11.98%

6–12

1269

53.32%

0.226 (0.117–0.436)

 < 0.001

1049

30.37%

0.337 (0.172–0.663)

 < 0.001

460

8.71%

12–17

110

4.62%

REF

 

65

1.88%

REF

 

10

0.19%

Season

Spring

546

22.94%

0.735 (0.615–0.878)

 < 0.001

705

20.41%

0.924 (0.797–1.073)

 > 0.05

1092

20.67%

Summer

725

30.46%

0.360 (0.304–0.426)

 < 0.001

1195

34.60%

0.754 (0.656–0.866)

 < 0.001

1656

31.35%

Autumn

623

26.18%

0.514 (0.434–0.817)

 < 0.001

991

28.69%

0.832 (0.725–0.956)

 < 0.001

1636

30.97%

Winter

486

20.42%

REF

 

563

16.30%

REF

 

898

17.00%

  1. The multiple logistic regression model includes all the variables in this table.
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