TABLE 2—

Extended Cox Analysis for State-Level Clean Indoor Air Laws: United States, 2003–2010

Variable	Hazard Ratio (95% CI)	P
Ballot initiative	1.20 (0.68, 2.15)	.516
Term limits	2.15 (1.27, 3.65)	.005
Preemption	3.26 (1.11, 9.53)	.031
Legislative professionalism
Without preemption	1.01 (0.98, 1.03)	.573
With preemption	3.28 (1.10, 9.75)	.033
Previous clean indoor air law policy	0.20 (0.09, 0.48)	< .001
Smoking prevalence	0.77 (0.68, 0.87)	< .001
Citizen ideology	1.03 (1.01, 1.05)	.013
Government ideology	1.01 (0.99, 1.03)	.195
Major tobacco-producing state	0.15 (0.02, 1.13)	.066

Note. CI= confidence interval.