Table 6.

Factors associated with periodontal disease among COPD sufferers

Variable	Category	OR (95% CI)
Age	40–54 years	1
	55–64 years	0.83 (0.63–1.08)
	65 years or more	0.51 (0.39–0.66)
Educational level	No studies/primary	1
	Secondary	0.77 (0.59–1.01)
	High education	0.57 (0.42–0.76)
Last visit to the dentist	,3 months	1
	3–12 months	0.92 (0.68–1.23)
	12 months or over	0.77 (0.60–0.98)
Dental insurance type	Public health insurance	1
	Private insurance	0.50 (0.37–0.67)
	Fully private practice	0.44 (0.33–0.58)
Mental disorders	Yes	1.61 (1.32–1.97)

Notes: OR estimated using multivariable unconditional logistic regression. Independent variables included in the model were all those with a significant difference in the prevalence of periodontal disease among COPD subjects and age- and sex-matched non-COPD controls (shown in Tables 2, 3, and 5) except “reasons for the last visit to the dentist.” In the current table, only those variables with a significant OR are shown.

Abbreviations: COPD, chronic obstructive pulmonary disease; OR, odds ratio.