Table 6.

Hierarchical regression models to predict symptom severity from gross motor DQ and fine motor DQ in 5-year-old group.

Group	Explanatory variables	Step 1	Step 2a	Step 2b
		β	β	β
ADHD Group 2	Age	−0.03	−0.02	−0.04
	Gender	0.20	0.22	0.25*
	Adaptive behavior DQ	0.08	0.10	0.13
	Language DQ	−0.09	−0.09	−0.05
	Personal-social DQ	0.08	0.10	0.15
	Gross motor DQ		−0.11
	Fine motor DQ			−0.35*
		R2 = 0.05	R2 = 0.06	R2 = 0.15*
			ΔR2 = 0.01	ΔR2 = 0.10*
Group	Explanatory variables	Step 1	Step 2a	Step 2b
		β	β	β
Symptom-like Group 2	Age	−0.12	−0.12	−0.10
	Gender	−0.09	−0.09	−0.07
	Adaptive behavior DQ	−0.06	−0.05	−0.04
	Language DQ	−0.14	−0.14	−0.11
	Personal-social DQ	0.21	0.22	0.22
	Gross motor DQ		−0.04
	Fine motor DQ			−0.11
		R2 = 0.05	R2 = 0.05	R2 = 0.06
			ΔR2 = 0.00	ΔR2 = 0.01

The alpha value is set to 0.05/4 ≈ 0.017.

^*p < 0.05, corrected with Bonferroni correction. The response variable is symptom severity (Inattentive + Hyperactive).