Table 2.

Association of dietary magnesium intake with periodontitis.

Exposure	Unadjusted model	Model 1	Model 2	Model 3
Mg _Q1	1 (Ref)	1 (Ref)	1 (Ref)	1 (Ref)
Mg _Q2	0.71 (0.57~0.9)	0.78 (0.6~1.01)	0.8 (0.61~1.04)	0.79 (0.61~1.03)
Mg _Q3	0.66 (0.53~0.83)	0.72 (0.56~0.94)	0.74 (0.57~0.98)	0.76 (0.58~1)
Mg _Q4	0.74 (0.59~0.93)	0.85 (0.66~1.11)	0.9 (0.68~1.18)	0.88 (0.67~1.16)
Mg_Q5	0.66 (0.53~0.83)	0.65 (0.5~0.86)	0.69 (0.52~0.92)	0.69 (0.52~0.92)
P-value for trend	0.002	<0.001	0.02	0.03

Model 1: adjusted for gender, age, race.

Model 2: Model 1+ adjusted for smoke, PIR, alcohol.

Model 3: Model 2+smoke, alcohol and BMI, DM.