Table A26.

Results from stepwise regression models for eyes closed delta activity at electrode Fz.

		Unstandardized Coefficients		Standardized Coefficients
Step	Predictor	B	SE	β	p	R 2	ΔR2	F	p
1	Age	−0.063	0.010	−0.383	<0.0001	0.165	0.165	40.67	<0.0001
2	Age Inattention Hyp/imp	−0.062 −0.031 0.025	0.010 0.096 0.099	−0.380 −0.024 0.084	<0.0001 0.748 0.799	0.165	0.000	13.47	<0.0001
3	Age Inattention Hyp/imp Data quality (artifact-free segments in %)	−0.049 −0.047 −0.064 −0.012	0.010 0.091 0.096 0.003	−0.321 −0.032 0.034 −0.213	<0.0001 0.604 0.504 <0.0001	0.247	0.082	16.66	<0.0001

N = 207. Hyp/imp = Hyperactivity/impulsivity. SE = standard error of B.