Table 4.

Marginal effects of the impact of state tobacco control policies on smoking frequency (number of days/months cigarettes are smoked)

		Model 1		Model 2
	Mean %a Smoked	Marginal effect of coefficientb	p value	Marginal effect of coefficientb	p value
All adolescents
0 days	80.8%
1–5 days	7.3%
6–29 days	6.0%
30+ days	6.0%
Cigarette tax ($1.00)
0 days		0.011	.1
1–5 days		−0.003	.1
6–29 days		−0.003	.1
30+ days		−0.005	.1
100% smoke-free restaurants (yes/no)
0 days		0.012	.005	0.012	.005
1–5 days		−0.003	.005	−0.003	.005
6–29 days		−0.004	.005	−0.004	.005
30+ days		−0.005	.005	−0.005	.005
Interaction with cigarette tax ($1.00)
Age – 14 years
0 days	88.7%			0.019	.01
1–5 days	5.5%			−0.007	.01
6–29 days	3.7%			−0.006	.01
30+ days	2.1%			−0.006	.01
Age – 15 years
0 days	85.0%			0.013	.05
1–5 days	6.6%			−0.004	.05
6–29 days	4.8%			−0.004	.05
30+ days	3.5%			−0.005	.05
Age – 16 years
0 days	80.8%			0.013	.09
1–5 days	7.2%			−0.004	.09
6–29 days	6.1%			−0.004	.09
30+ days	5.9%			−0.006	.09
Age – 17 years
0 days	77.5%			0.010	.2
1–5 days	8.0%			−0.002	.2
6–29 days	6.9%			−0.003	.2
30+ days	7.7%			−0.005	.2
Age – 18 years
0 days	72.7%			−0.005	.6
1–5 days	8.9%			0.001	.6
6–29 days	8.1%			0.001	.6
30+ days	10.3%			0.003	.6

Values in bold type are statistically significant (p ≤ .05).

^aWeighted

^bModel includes adjustment for the following covariates: state tobacco control expenditure, age, race, sex, state, and year