Table 3.

Odds ratios (95% CI) for trying cigarettes by selected characteristics

Occurrences of tobacco use in movies seen	Crude odds ratio (n=4919)	Adjusted odds ratio
		Sociodemographic factors* (n=4919)	Sociodemographic factors and social influences† (n=4815)	Sociodemographic factors, social influences, and characteristics of child and parenting‡ (n=4569)
0-50	1	1	1	1
51-100	3.1 (2.3 to 4.1)	2.4 (1.8 to 3.3)	1.7 (1.2 to 2.4)	1.9 (1.3 to 2.7)
101-150	5.5 (4.1 to 7.3)	4.0 (2.9 to 5.4)	2.4 (1.7 to 3.4)	2.6 (1.8 to 3.7)
>150	8.8 (6.6 to 11.6)	6.1 (4.5 to 8.1)	2.7 (2.0 to 3.8)	2.5 (1.7 to 3.5)

^*Age, sex, parents' education, and school. 

^†Friend smoking, sibling smoking, parent smoking, receptivity to tobacco promotions. 

^‡School performance, propensity to sensation seeking, rebelliousness, self esteem, two measures of authoritative parenting, and perception of parental disapproval of smoking.