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Table 5 Mean serum levels of 25-OH-D (ng/ml) per month

From: Effect of vitamin D3 seasonal supplementation with 1500 IU/day in north Italian children (DINOS study)

 

Total

Groups

T-test P

A. Suppl.

B. No suppl.

01. January

n

29

14

15

0.009*

Mean

21.6

26.6

16.9

02. February

n

24

11

13

0.007*

Mean

27.8

36.0

20.8

03. March

n

16

8

8

0.014*

Mean

25.5

36.5

14.5

04. April

n

16

2

14

0.046*

Mean

18.6

30.5

16.9

05. May

n

23

8

15

0.861

Mean

24.8

25.4

24.5

06. June

n

21

10

11

0.096

Mean

23.8

28.6

19.4

07. July

n

16

9

7

0.627

Mean

29.4

30.7

27.9

08. August

n

12

7

5

0.574

Mean

36.8

38.4

34.6

09. September

n

10

3

7

0.295

Mean

30.4

36.0

28.0

10. October

n

10

4

6

0.049*

Mean

29.2

38.3

23.2

11. November

n

12

3

9

0.476

Mean

26.0

35.0

23.0

12. December

n

14

3

11

0.228

Mean

26.3

32.7

24.5

  1. = number of children in each group
  2. *below P significance level