Table 4 Comparison of vitamin D serum levels (VDSL) in Varese study (V), Cattaruzza (C) and Nurnberg (N).

From: Role of vitamin D serum levels in prevention of primary and recurrent melanoma

VDSL

M

C

p

n

%

n

%

V

C

N

V

C

N

V

C

N

V

C

N

V

C

N

≤ 20 ng/ml

76

91

160

49.4

66.2

78.1

24

15

89

19.2

15.2

63.1

< 0.001

< 0.001

< 0.001

> 20 ng/ml

78

46

45

50.6

33.8

22.0

101

84

52

80.8

84.8

36.9

   

≥ 30 ng/ml

22

10

–

14.3

7.3

–

61

37

–

48.8

37.4

-

   

Study

Mediancases (ng/ml)

Median controls (ng/ml)

p

            

Varese

20.3

29.5

< 0.0001

            

Cattaruzza

18.0

27.8

< 0.001

            

Nurnberg

16.9

18.8

0.44

            
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