Table 5.

Multiple linear regression coefficients

Variable in the model	Coefficients			p-value
	Unstd. B	Std. Error	Std. Beta
Location
Urban	0.44	0.11	0.14	<0.0001*
Rural (Ref)	0	0	0
Smoker
Father only smoker	0.44	0.12	0.15	<0.0001*
Father and Family smoker	0.78	0.30	0.09	0.010*
Neither Parents smoke (Ref)	0	0	0
Occupation of Father
Armed Forces	0.55	0.12	0.16	<0.0001*
Manager/Professional (Ref)	0	0	0
Education of Father
Diploma/Technical cert.	0.35	0.15	0.08	0.021*
Degree/College (Ref)	0	0	0
Parental-reported exposure hours to SHS
1 to 3	0.44	0.12	0.15	<0.0001*
None (Ref)	0	0	0
Air-conditioning in home
Living room	-0.72	0.24	-0.11	0.002*
Child's sleeping area	-0.39	0.16	-0.08	0.017*
None (Ref)	0	0	0
Constant	-1.56	0.12		<0.0001*

Adjusted R² = 0.122; Ref: Reference category Unstd: Unstandardised Std.: Standardised