Table 2.

Weighted association between dietary magnesium intake and periodontitis

Magnesium intake	OR (95% CI), p-value
	Model 1	Model 2	Model 3
Q1	Reference	Reference	Reference
Q2	0.84 (0.70, 1.01) 0.068	0.80 (0.65, 0.98) 0.036	0.89 (0.73, 1.08) 0.2
Q3	0.81 (0.65, 1.01) 0.060	0.76 (0.60, 0.96) 0.023	0.86 (0.68, 1.09) 0.2
Q4	0.71 (0.58, 0.86) <0.001	0.61 (0.48, 0.77) <0.001	0.72 (0.57, 0.92) 0.009
P for trend	0.002	<0.001	0.012

Model 1 unadjusted.

Model 2 adjusted for age, gender and race.

Model 3 adjusted for age, gender, race, body mass index, waist circumference, education level. Smoking status, alcohol drinking status, diabetes, hypertension, and cardiovascular disease.

p < 0.05 indicates statistical significance.