Table 3.

Categorical obesity-related predictors of periodontal disease progression. Adjusted hazard ratios and 95% CI.

	Periodontal Disease Event (≥2 teeth progressed to indicated level)
Predictor	Probing Depth ≥5mm*	CAL ≥5mm†	ABL ≥40%‡
Baseline BMI category
Ideal (18.1–24.9 kg/m2)	1.0 (reference)	1.0	1.0
Overweight (25–29.9 kg/m2)	1.09 (0.92-1.30)	1.13 (0.88-1.46)	1.07 (0.83-1.38)
Obese (≥30kg/m2)	1.40 (1.02-1.91)	1.52 (1.05-2.21)	1.60 (1.07-2.38)
Baseline waist circumference category
Normal (<102 cm)	1.0	1.0	1.0
High (≥102 cm)	1.23 (0.95-1.61)	0.99 (0.75-1.33)	1.24 (0.88-1.75)
Baseline waist-height ratio category
Normal (<50%)	1.0	1.0	1.0
High (≥50%)	1.15 (0.95-1.39)	1.41 (1.01-1.97)	1.26 (0.95-1.67)

All models adjusted for age, cigarette use (yes/no), education beyond high school (yes/no), number of decayed or filled surfaces, treatment for periodontal disease in past year (yes/no), prophylaxis in past year (yes/no), and diabetes diagnosis (yes/no). All independent variables except education were treated as time-dependent covariates.

^*Individual had 2 or more teeth that either progressed to ≥5mm or were lost after having >3 but <5mm probing depth at each prior examination

^†Individual had 2 or more teeth that either progressed to ≥5mm or were lost after having >3 but <5mm CAL at each prior examination

^‡Individual had 2 or more teeth that either progressed to ≥40%or were lost after having >20% but <40% ABL at each prior examination