TABLE 2.

Baseline Exposure to Environmental Tobacco Smoke and Indoor Airborne Particles According to Group Assignment

Characteristics	Intervention Group (N = 110)	Control Group (N = 115)	P
Tobacco exposure
No. of cigarettes smoked around house per d, mean ± SD	12.9 ± 1.8	13.3 ± 2.2	.716
Serum cotinine level, mean ± SD, ng/mL	1.18 ± 3.9	1.23 ± 3.3	.622
Hair cotinine level, mean ± SD, ng/mg	0.14 ± 3.8	0.14 ± 3.5	.970
No. of airborne particles, mean ± SD, 106/ft3
Particles of >0.3 μm	4.0 ± 2.56	4.7 ± 2.58	.003
Particles of >5 μm	0.003 ± 2.31	0.004 ± 2.14	.154