Table 6.

Between-season comparison of vitamin D levels.

		Serum calcidiol level
P-value	Between-season comparison	<20 ng/mL	21–29 ng/mL	>30 ng/mL
	Winter-Spring	0.19	0.21	0.78
	Winter-Summer	<0.001	0.36	<0.001
	Winter-Autumn	0.01	0.18	0.07
	Spring-Summer	<0.001	0.58	<0.001
	Spring-Autumn	0.44	0.43	0.25
	Summer-Autumn	<0.001	0.59	<0.001

P-value calculated using the Pearson's χ2 test. Bold values are statistically significant (P < 0.05).