. Author manuscript; available in PMC: 2012 May 1.

Published in final edited form as: Am J Prev Med. 2011 May;40(5):572–575. doi: 10.1016/j.amepre.2010.12.020

Table 1.

Secondhand smoke (SHS) exposure by home/car smoking ban agreement

	n	Urine Cotinine	Reported SHS exposure in the home
	n	Geometric M (95% CI) (ng/mL)	Parent-reported zero exposure (%)	Child -reported zero exposure (%)
Home smoking ban
Agreement: ban	183	2.08 (1.90,2.28)	55.2	60.3
Disagreement	71	3.72 (2.94,4.70)	28.2	38.0
Agreement: no ban	116	5.90 (4.92,7.08)	19.0	24.6

		F=57.01	χ²=43.36	χ²=38.77
		p<0.001	p<0.001	p<0.001

	n	Urine Cotinine	Reported SHS exposure in the car
	n	Geometric M (95% CI) (ng/mL)	Parent-reported zero exposure (%)	Child-reported zero exposure (%)

Car smoking ban
Agreement: ban	95	1.93 (1.75,2.27)	98.9	97.9
Disagreement	103	2.64 (2.27,3.09)	83.5	86.4
Agreement: no ban	146	4.37 (3.74,5.09)	61.0	75.7

		F=27.99	χ²=51.14	χ²=22.83
		p<0.001	p<0.001	p<0.001