Table 5.

Adjusted odds ratios (ORs) and 95% confidence intervals (CIs) for students' dental checkups and reported abstinence from tobacco products, according to sex, place of origin, age, educational level, and year of survey.

	Dental checkups		Never use of tobacco
	OR	95% CI	OR	95% CI
Sex
Female vs male	2.5	2.0–3.1	6.8	4.2–11.2
Age
19–25 yrs vs >25 yrs	0.9	0.7–1.2	1.6	1.6–2.2
Place of residence
Urban vs rural	1.5	1.2–1.9	1.0	0.7–1.3
Educational level
Higher vs lower	1.2	0.9–1.5	0.6	0.4–0.8
Survey year
2001 vs 1999	1.0	0.9–1.3	1.5	1.1–1.9

Model chi-square (df): Dental checkups χ² = 85.2 (5); P < 0.001. Abstinence from tobacco χ² = 121.3 (5); P < 0.001.