Table 1.

Vitamin D values in different age groups and vitamin D values of indoor and outdoor athletes for autumn and winter.

Age group		N	Vitamin D (ng/mL), mean ± SD	p-value
5–17		409	21.4 ± 14.3	0.000*
18–30		110	15.1 ± 9.6	0.440**
30+		36	19.5 ± 11.4	0.026***
Feature
Autumn months	Outdoor athletes	29	23.7 ± 15.7	0.132
	Indoor athletes	126	29.1 ± 17.8
Winter months	Outdoor athletes	133	17.2 ± 9.6	0.643
	Indoor athletes	267	16.7 ± 10.3

SD: standard deviation.

^*Comparison between the 5–17 and 18–30 age groups.

^**Comparison between the 5–17 and 30+ age groups.

^***Comparison between the 18–30 and 30+ age groups.