TABLE 2.

Multi‐variable multi‐nominal regression with no or mild periodontitis/moderate periodontitis/severe periodontitis as dependent variables

	Model 1		Model 2		Model 3
	OR (95% CI)	p Value	OR (95% CI)	p Value	OR (95% CI)	p Value
CMPF
Moderate	0.93 (0.79 to 1.09)	.38	.94 (0.80 to 1.11)	.48	0.95 (0.80 to 1.12)	.51
Severe	0.64 (0.49 to 0.83)	.001	.68 (0.52to 0.89)	.005	0.74 (0.56 to 0.98)	.03
CMPF Q4 versus Q1
Moderate	0.96 (0.61 to 1.54)	.86	1.05 (0.64 to 1.75)	.84	1.11 (0.66 to 1.85)	.70
Severe	0.31 (0.14 to 0.67)	.003	0.40 (0.17 to 0.93)	.03	0.55 (0.23 to 1.32)	.18
CMPF Q3 versus Q1
Moderate	1.32 (0.84 to 2.07)	.23	1.34 (0.85 to 2.11)	.22	1.33 (0.84 to 2.10)	.23
Severe	0.41 (0.19 to 0.88)	.02	0.48 (0.22 to 1.07)	.07	0.55 (0.24 to 1.25)	.15
CMPF Q2 versus Q1
Moderate	1.15 (0.74 to 1.79)	.54	1.19 (0.76 to 1.86)	.45	1.23 (0.79 to 1.92)	.35
Severe	0.38 (0.17 to 0.87)	.02	0.52 (0.22 to 1.25)	.14	0.57 (0.24 to 1.37)	.22
N	922		922		922

Note: No or mild periodontitis is the reference category. Z‐ and ln‐transformed CMPF as well as comparing the fourth, third, and second quartile of CMPF levels with the first quartile. Model 1 (M1) adjusted for age and sex; Model 2 (M2) adjusted for M1 + level of education, fasting plasma glucose level, and body mass index; and Model 3 (M3) adjusted for M2 + smoking status. CMPF 4 versus 1 is the fourth versus first quartile of CMPF; CMPF 3 versus 1 is the third versus first quartile of CMPF; and CMPF 2 versus 1 is the second versus first quartile of CMPF. Significant values are indicated with bold font.

Abbreviations: CI, confidence interval; CMPF, 3‐carboxy‐4‐methyl‐5‐propyl‐2‐furanpropionic acid; OR, odds ratio.