Table 2

Mean 25(OH)D according to sunbathing habits.

25(OH)D in summer (nmol/L)

25(OH)D in winter (nmol/L)


N*

Mean

SD

N*

Mean

SD


Avoids sun

36

44.7

1.9

40

33.5

1.9

Arms/face

66

54.7

2.0

78

40.6

1.5

Whole body

206

63.1

1.3

240

46.3

1.0

P value (ANOVA)

P < 0.0001

P < 0.0001


Arms/face vs. avoids sun

10.1 (1.8–18.3); p = 0.01

7.0 (0.5–13.6); p = 0.03

Whole body vs. avoids sun

18.4 (11.2–25.6); p < 0.001

12.8 (7.1–18.6); p < 0.001

Arms/face vs. whole body

8.4 (2.7–14.0); p = 0.001

5.8 (1.4–10.1); p = 0.006


* 10 subjects did not provide their sun-bathing habits data

† Post-hoc analysis using Tukey test; presented as differences in mean (95% CI); p value

Kull et al. BMC Public Health 2009 9:22   doi:10.1186/1471-2458-9-22

Open Data