Table 2 Serum vitamin D concentration at baseline and 3 months following administration of the participants.

From: Impact of vitamin D in children with chronic tonsillitis (immunohistochemical study of CD68 polarisation and proinflammatory cytokines estimation)

Groups

Serum vitamin D concentration (ng/ml)

P-value†

At baseline

After 3–6 months

Vitamin D group

12.5 ± 5.3

37.9 ± 6.3

 < 0.001

Placebo group

12.6 ± 4.6

12.7 ± 5.6

0.95

P-value‡

0.95

 < 0.001

 
  1. Data are mean ± SD.
  2. †Paired samples t-test (same group).
  3. ‡Independent samples-test (between two groups).
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