Table 4.

Variables associated with exposure to environmental tobacco smoke among Cambodian teenagers - Multivariate analysis

	ETS exposure at home	ETS exposure outside at home	ETS exposure both at home and outside home
	OR (95% CI)	OR (95% CI)	OR (95% CI)
Age (years)
≤ 12	1.00	1.00	1.00
13	0.94 (0.58, 1.52)	1.50 (0.95, 2.37)	1.18 (0.73, 1.91)
14	1.45 (0.94, 2.25)	1.49 (0.98, 2.27)	1.13 (0.73, 1.77)
15	0.94 (0.63, 1.39)	1.40 (0.95, 2.07)	0.90 (0.60, 1.34)
≥16	1.13 (0.79, 1.60)	1.62 (1.15, 2.27)	1.21 (0.84, 1.72)
Gender
Females	1.00	1.00	1.00
Males	0.90 (0.73, 1.11)	0.86 (0.70, 1.06)	0.91 (0.73, 1.12)
Parents smoking
None	1.00	1.00	1.00
One or more parents smoking	3.71 (3.02, 4.57)	2.05 (1.67, 2.52)	3.18 (2.58, 3.92)
Friends smoking
No	1.00	1.00	1.00
Yes	1.75 (1.35, 2.27)	1.82 (1.40, 2.37)	1.74 (1.36, 2.24)