Table 3.

Differences in urinary cotinine levels for children living with smokers and the smoking behaviors of the caregiver.

Independent Variable	Beta (Unstandardized Coefficient)	Std Error *	Beta (Standardized Coefficient)	R2	t	p
MODEL a				0.650
Children not living with smoker (reference group )	1
Children living with one smoker	1.256	0.134	0.650		9.403	0.000
Children living with more than one smoker	1.481	0.139	0.633		10.640	0.000
Daily cigarette consumption (>20)	0.647	0.070	0.245		9.302	0.000
Smoker smokes at home every day	0.330	0.125	0.151		2.650	0.008

^a Final stepwise linear regression model with the caregiver’s age, home size, number of caregiver smokers, domestic smoking restrictions, if the caregiver smokes cigarettes at home every day, and daily cigarette consumption of caregiver; constant = −0.388; final adjusted r = 0.648. * Std error: standard error.