Table 1.

Mean, standard deviations, and significance levels for total sample and by prenatal smoke exposure

	Total sample	Prenatal smoke exposure
	Mean (SD)	Mean (SD)
		No	Yes	p-value
SES	−0.07 (.78)	0.01 (.74)	−0.44 (.89)	**
Mom ADHD: impulsive/conduct	7.43 (5.98)	7.64 (6.06)	6.44 (5.54)	ns
Mom ADHD: attention/organization	8.50 (5.80)	8.47 (5.84)	8.62 (5.72)	ns
W2 substance use	0.77 (1.32)	0.86 (1.40)	0.28 (.53)	*
W2 IA Sx: maternal report	1.33 (.96)	1.26 (.96)	1.70 (.87)	*
W2 IA Sx: teacher report	0.93 (.81)	0.84 (.75)	1.38 (.95)	**
W2 HI Sx: maternal report	0.66 (.75)	0.56 (.70)	1.13 (.83)	***
W2 HI Sx: teacher report	0.41 (.60)	0.33 (.49)	0.82 (.88)	***
W2 ODD Sx: maternal report	0.95 (.83)	0.89 (.80)	1.28 (.91)	*
W2 ODD Sx: teacher report	0.39 (.63)	0.34 (.60)	0.65 (.75)	*
W3 substance use	3.02 (2.35)	2.96 (2.34)	3.27 (2.40)	ns
W3 IA Sx: maternal report	1.18 (.99)	1.09 (.98)	1.67 (.92)	**
W3 IA Sx: youth report	0.89 (.69)	0.85 (.66)	1.09 (.79)	†
W3 HI Sx: maternal report	0.55 (.68)	0.47 (.63)	0.96 (.80)	**
W3 HI Sx: youth report	0.63 (.59)	0.58 (.55)	0.87 (.74)	*
W3 ODD Sx: maternal report	0.93 (.85)	0.87 (.83)	1.21 (.91)	†
W3 ODD Sx: youth report	0.55 (.57)	0.53 (.56)	0.65 (.63)	ns

Note. ADHD, attention deficit hyperactivity disorder; HI, hyperactive-impulsive; IA, inattentive; Sx, symptoms.

SNAP, Swanson, Nolan, and Pelham Questionairre-4th Edition (Swanson, 1992); ODD, oppositional defiant disorder.

^†p < 0.10.

^*p < 0.05.

^**p < 0.01.

^***p < 0.001.