(c).

Predictors	Model 1 (QOL)			Model 2 (object control)			Model 3 (QOL)
	Standardized coefficient	Unstandardized coefficient	SE	Standardized coefficient	Unstandardized coefficient	SE	Standardized coefficient	Unstandardized coefficient	SE
Age	-0.05	-0.45	1.08	0.37∗∗	0.87∗∗	0.26	-0.14	-1.25	1.13
Gender	-0.16	-5.32	3.82	-0.20	-1.72	0.90	-0.12	-3.86	3.85
BMI	0.00	0.01	0.49	0.11	0.12	0.12	-0.02	-0.10	0.48
ADHD subtype	0.15	2.05	1.57	0.06	0.21	0.37	0.14	1.85	1.54
ADHD severity	-0.42∗∗∗	-0.63∗∗∗	0.18	-0.14	-0.06	0.04	-0.38∗∗	-0.58∗∗	0.18
MVPA	0.03	0.01	0.05	0.31∗∗	0.03∗∗	0.01	-0.05	-0.02	0.05
Object control							0.24∗	0.93∗	0.46
R 2	0.14			0.24			0.18

Note. ^∗p < .05; ^∗∗p < .01, ^∗∗∗p < .001. Both standardized and unstandardized regression coefficients are presented. MVPA: moderate-to-vigorous physical activity; SF: social functioning; SCF: school functioning; QOL: quality of life.