TABLE 3.

Interactive effect of vitamin D and dietary magnesium intake on IR (All participants).

	Model 1			Model 2			Model 3
Variable	OR (95%CI)	P-value	P for interaction	OR (95%CI)	P-value	P for interaction	OR (95%CI)	P-value	P for interaction
Vit D	0.99 (0.99∼0.99)	<0.001		0.98 (0.97∼0.99)	<0.001		0.93 (0.88∼0.98)	<0.001
Magnesium intake group
<267 mg/day Vit D	0.99 (0.99∼0.99)	<0.001	<0.001	0.98 (0.97∼0.99)	<0.001	<0.001	0.94 (0.90∼0.98)	<0.001	<0.001
≥267 mg/day Vit D	0.98 (0.97∼0.99)	<0.001		0.96 (0.93∼0.99)	<0.001		0.92 (0.88∼0.96)	<0.001

Model 1: non-adjusted. Model 2: adjusted age, sex, race. Model 3: adjusted age, sex, race, obesity, education level, physical activity, smoking status, the season of examination, and dietary calcium intake.