Table 2. Odds Ratios for 25-Hydroxy Vitamin D Level across Various Quartiles of Serum Zinc of Adolescents: The CASPIAN-III Study .

Quartile	OR	95% CI for OR	p *
Q1 (0.70-1.00 µg/ml)	Reference	Reference	-
Q2 (1.00-1.30 µg/ml)	2.603	1.710-3.851	0.002
Q3 (1.30-1.70 µg/ml)	1.561	0.824-3.745	0.219
Q4 (1.70-2.00 µg/ml)	24.646	20.120-26.682	<0.001