Characteristic	Est.	SE	F	df	P value	
Age 4 vs. age 6	0.73	0.39	3.49	1, 57	.067	
At or below poverty (≤$20,000/year)	1.29	0.63	4.15	1, 53	.047	
Male vs. female	-1.03	0.47	4.83	1, 56	.032	
Reported child SHS exposure	1.69	0.35	23.84	1, 55	<.001	
Child ADHD	0.82	0.48	3.01	1, 57	.088	
Child ADHD severity	0.11	0.05	4.29	1, 57	.043	
Child ADHD inattentive severity	0.12	0.08	2.29	1, 57	.136	
Child ADHD hyperactive/impulsive severity	0.14	0.09	2.47	1, 57	.121	
Child CD and/or ODD	0.69	0.44	2.44	1, 57	.124	
Child CD severity	0.36	0.17	4.66	1, 57	.035	
Child ODD severity	0.14	0.10	2.05	1, 57	.158	
Child CD/ODD severity	0.14	0.07	3.72	1, 57	.059	
Mother reported prenatal smoking	1.62	0.62	6.89	1, 55	.011	

Title:
Table 2. Univariate repeated measures mixed models of salivary cotinine levels in 59 children*
Footnote:
*Paternal ADHD and CD diagnoses were used as covariants.
ADHD, Attention-deficit/hyperactivity disorder; CD, conduct disorder; ODD, oppositional defiant disorder; SHS, secondhand smoke; Est., estimate; SE, standard error; df, degrees of freedom.