TABLE 3.

Binary Logistic Regression Analysis of the Relationship Between Secondhand Smoke and Severe Periodontitis: Atherosclerosis Risk in Communities Study; Forsyth County, NC; Jackson, MS; suburban Minneapolis, MN; and Washington County, MD; 1996–1998

Level of Secondhand Smoke Exposure	Unadjusted OR (95% CI)	AOR (95% CI)a
≥ 26 h/wk	1.5 (0.9, 2.3)	2.0 (1.2, 3.4)
1–25 h/wk	1.2 (0.9, 1.9)	1.3 (1.0, 1.7)
Not exposed to secondhand smoke (Ref)	1.0	1.0

Note. AOR = adjusted odds ratio; CI = confidence interval; OR = odds ratio. Severe periodontitis case status was defined as ≥ 5 sites with clinical attachment level ≥ 3 mm and probing depth ≥ 5 mm. The pseudo-R² statistic = 0.002 for the unadjusted model and 0.16 for the adjusted model. ORs and 95% CI are unadjusted and adjusted for covariates.

^aAdjusted for age, education, center and race, gender and hormone replacement therapy, remaining teeth, extent of plaque scores ≥ 2, and dental visiting pattern.