TABLE II.

Summary of SDP-ADHD Associations

Outcome variable	Model 1	Model 2
	Child-specific SDP severity	Child-specific SDP relative to family average Family average (within-family effect)	SDP (between family effect)
Parent report
Conners Inatt (IN)	0.07* (0.03)	0.06 (0.04)	0.13+ (0.07)
Conners Hyp/Imp (HI)	0.10* (0.03)	0.07* (0.03)	0.20* (0.07)
Conners Total	0.09* (0.03)	0.06+ (0.03)	0.20* (0.07)
CBCL Total	0.04 (0.03)	0.01 (0.03)	0.19* (0.07)
Teacher report
Conners Inatt (IN)	0.02 (0.04)	0.02 (0.05)	0.01 (0.08)
Conners Hyp/Imp (HI)	0.01 (0.04)	−0.01 (0.05)	0.09 (0.07)
Conners Total	0.01 (0.04)	−0.001 (0.05)	0.03 (0.07)
TRF Total	0.03 (0.05)	0.05 (0.06)	−0.01 (0.08)
Cross-rater
Conners Inatt (IN)	0.06* (0.03)	0.05 (0.04)	0.07 (0.06)
Conners Hyp/Imp (HI)	0.06* (0.03)	0.05 (0.03)	0.12+ (0.06)
Conners Total	0.07* (0.03)	0.05 (0.04)	0.10 (0.07)
CBCL/TRF Total	0.05 (0.03)	0.02 (0.04)	0.13+ (0.07)

Unstandardized beta-weights are presented, followed by standard errors in parentheses. Each row represents a different outcome variable and summarizes only the SDP severity findings from the larger models noted along the top. All parameter and variance estimates and model fit information from each of the models are provided in supplemental materials. Model 1 includes the effect of child-specific SDP severity as a level 1 predictor of the ADHD symptom score labeled on the left, and the additional individual- and family level covariates (child sex, child birth order, maternal education, age, marital status, food stamps qualification at birth, and second-hand smoke exposure during pregnancy). Model 2 includes the within-family effect of child-specific SDP severity relative to the family average as a level 1 predictor, and the between-family effect of family average SDP severity as a level 2 predictor of the various ADHD symptom scores labeled on the left, as well as the covariates.

^*P < 0.05;

⁺P < 0.10.