Table 3.

Explained deviance and beta coefficients

	TDC versus ADHD-only		TDC versus ADHD + ODD		ADHD-only versus ADHD + ODD
	Explained deviance (%)	Beta coefficient	Explained deviance (%)	Beta coefficient	Explained deviance (%)	Beta coefficient
Total model	58.4		62.5		15.3
Parental ADHD	27.2	3.91	21.9	3.34	2.4	−0.42
Adverse life events	6.0	0.50	13.9	0.57	3.0	0.12
Birth weight	ns	0.00	2.0	0.00	ns	0.00
Pregnancy duration	ns	0.00	ns	0.00	ns	0.00
Maternal smoking during pregnancy	1.3	0.00	ns	0.00	ns	0.00
Socioeconomic status	ns	0.00	1.5	−0.16	5.6	−0.18
Deviant peer affiliation	ns	0.00	3.8	−0.15	4.8	−0.05
Parental warmth	–	–	–	–	ns	0.00
Parental criticism	–	–	–	–	6.4	0.34

Percentage per predictor is an estimation, hence the separate percentages do not add up to total model. Parental warmth and parental criticism scores were only available for diagnostic groups and, therefore, not included in models assessing predictors against controls

ADHD attention-deficit/hyperactivity disorder, ODD oppositional defiant disorder, TDC typically developing controls, ns not significant