Table 5. Predictive value of childhood measures on parent ratings of functional impairment in adolescence/adulthood.

	r	t	F	df	p
ADHD symptoms
Inattention
Parent-rated	0.37	4.28	18.29	1/113	<0.01
Teacher-rated	0.05	0.50	0.25	1/107	0.25
Hyperactivity-Impulsivity
Parent-rated	0.33	3.75	14.03	1/112	<0.01
Teacher-rated	0.16	1.67	2.79	1/107	0.10
Activity level
Mean intensity	0.26	2.17	4.69	1/65	0.03
Mean count	0.22	1.78	3.15	1/65	0.08
IIV intensity	0.21	1.77	3.14	1/65	0.08
IIV count	0.13	1.06	1.11	1/65	0.30
Co-occurring symptoms
Oppositional behaviours
Parent-rated	0.31	3.47	12.05	1/112	<0.01
Teacher-rated	0.05	0.50	0.25	1/106	0.25
Anxious/shy behaviours
Parent-rated	0.24	2.64	6.97	1/112	0.01
Teacher-rated	0.00	0.05	0.00	1/107	0.96
Social problems
Parent-rated	0.32	3.57	12.73	1/113	<0.01
Teacher-rated	0.09	0.88	0.38	1/107	0.78
Emotional problems
Parent-rated	0.33	3.73	13.93	1/112	<0.01
Teacher-rated	0.07	0.76	0.58	1/107	0.45
Social communication	0.15	1.66	2.77	1/113	0.10
SES	−0.22	−2.32	5.38	1/103	0.02
Cognitive performance
FIQ		−2.65	7.01	1/100	<0.01
VIQ		−1.16	1.35	1/98	0.25
PIQ	-	−4.21	17.73	1/98	<0.01
Digit span forward	−0.11	−0.99	0.99	1/85	0.32
Digit span backward	−0.11	−0.98	0.96	1/85	0.33
RTV	0.03	0.25	0.06	1/54	0.81
OE	−0.03	−0.21	0.04	1/64	0.84
CE	−0.07	−0.58	0.34	1/64	0.57
Choice impulsivity	0.15	1.25	1.57	1/66	0.21