Table 3. Differences in vitamin D levels between obstructive sleep apnea group and control group

	OSA (n=65)	Non-OSA (n=44)	p-value
25(OH)D (ng/mL)	18.2±5.5	21.3±8.6	0.04*
25(OH)D deficiency	45 (69.2)	20 (45.5)	0.02*
Age (month)	109.8±43.9	105.0±38.1	0.56
BMI z-score	1.4±1.1	0.7±1.0	<0.001†

Data are represented as the mean±standard deviation or n (%). p-values are from the Fisher’s exact test (categorical variables variables) or Mann-Whitney U test (quantitative variables).
p<0.05,
p<0.001.
OSA: obstructive sleep apnea, 25(OH)D: 25-hydroxyvitamin D, BMI: body mass index.