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. 2001 Dec 15;323(7326):1394. doi: 10.1136/bmj.323.7326.1394

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.