Table 4.

Adjusted Odds Ratios Showing Changes in the Probability of Youth Exposure to Pro-Tobacco Messages Over Time, National Youth Tobacco Surveys, 2000–2004^†‡

	TV or Movies		Internet		Newspaper or Magazines		Convenience Store, Supermarket, or Gas Station
	Odds Ratio	p	Odds Ratio	p	Odds Ratio	p	Odds Ratio	p
Time trend	0.83	0.000	1.17	0.000	0.87	0.000	0.94	0.000
Gender
Female	1.00		1.00		1.00		1.00
Male	0.83	0.000	0.98	0.226	0.80	0.000	0.71	0.000
Grade level
6–8	1.00		1.00		1.00		1.00
9–12	1.20	0.000	0.76	0.000	1.58	0.000	1.50	0.000
Race§
White	1.00		1.00		1.00		1.00
African-American	0.82	0.000	0.97	0.349	0.76	0.000	0.47	0.000
Hispanic	0.83	0.000	1.04	0.231	0.81	0.000	0.58	0.000
Smoking status
Current smokers	1.00		1.00		1.00		1.00
Former smokers	1.26	0.000	0.89	0.000	1.02	0.599	1.22	0.000
Never smokers	0.87	0.000	0.77	0.000	0.89	0.000	0.96	0.211
Weekly income
None	1.00		1.00		1.00		1.00
$1–$20	1.36	0.000	1.17	0.000	1.30	0.000	1.39	0.000
$21–$100	1.48	0.000	1.38	0.000	1.45	0.000	1.41	0.000
≥$101	1.16	0.002	1.35	0.000	1.41	0.000	1.21	0.000

^†Based on three cross-sectional National Youth Tobacco Surveys conducted in 2000, 2002, and 2004. Time trend was modeled as a continuous covariate. Odds ratios measure the change in the logit of the probability of self-reported exposure from 2000 to 2002 and from 2002 to 2004.

^‡Gender, grade level, race, smoking status, and weekly income were included as covariates in each logistic regression model.

^§Only youth classified as non-Hispanic white, non-Hispanic African-American, Hispanic, and Asian were included in the analyses.

^*Statistically significant at p < 0.0001.