Table 4.

Potentially modifiable correlates of smoking in cars with nonsmokers (N = 6,755)^a,^b,^c

Variable	Sample characteristics	% Smoke in cars with nonsmokers	OR	95% CI of OR	p
	n (%)
Believe that cigarette smoke is dangerous to nonsmokers
Yes	5,491 (81)	32	1.00	1.00	Ref
No	1,188 (18)	42	1.61	1.35–1.92	<.0001
Do not know	76 (1)	32	1.16	0.67–2.03	.59
Smoking policy at home
Smoking never allowed anywhere	2,558 (38)	25	1.00	1.00	Ref
Smoking allowed anywhere	1,963 (29)	42	2.28	1.87–2.78	<.0001
Something in-between	2,234 (33)	37	2.03	1.70–2.43	<.0001
Live in state/province with comprehensive smoke-free law
Yes	5,315 (79)	31	1.00	1.00	Ref
No	1,440 (21)	44	1.24	1.00–1.53	.05
Believe that secondhand smoke causes lung cancer in nonsmokers
Yes	5,180 (77)	33	1.00	1.00	Ref
No	1,210 (18)	40	1.39	1.16–1.67	.0003
Do not know	365 (5)	31	1.02	0.77–1.35	.91

Note. OR = odds ratio.

^aAll frequencies and data are weighted.

^bAdjusted for demographics in Table 1 and smoking behavior variables in Table 3.

^cModifiable correlates examined independently of each other.