Table 3. Results of regression analyses on baseline scores shows that combinations of education, age and Full Scale Intelligence Quotient (FSIQ) consistently predicted performance on the cognitive tasks.

TASK	R2	R2adj	F	P	Factor	β	t	P
Letter cancellation	0.152	0.137	10.188	<0.0001	Education	0.489	1.889	0.061
					Age	−0.171	−2.734	0.007
					FSIQ	0.136	2.442	0.016
Auditory verbal learning task (AVLT)	0.109	0.98	10.444	<0.0001	Age	−0.049	−3.505	0.001
Supraspan					FSIQ	0.033	3.006	0.003
AVLT total	0.204	0.194	21.862	<0.0001	Age	−0.35	−5.319	<0.0001
					FSIQ	0.208	4.04	<0.0001
AVLT delayed	0.146	0.136	14.563	<0.0001	Education	0.304	0.085	<0.0001
					Age	−0.077	0.024	0.002
Complex figure immediate	0.112	0.101	10.689	<0.0001	Age	−0.209	−3.939	<0.0001
					FSIQ	0.104	2.509	0.013
Complex figure delayed	0.139	0.129	13.789	<0.0001	Age	−0.201	−4.169	<0.0001
					FSIQ	0.124	3.28	0.001
Story immediate recall	0.206	0.196	22.125	<0.0001	FSIQ	0.122	5.24	<0.0001
					Age	−0.125	−4.207	<0.0001
Story delayed recall	0.209	0.2	22.593	<0.0001	FSIQ	0.121	5.141	<0.0001
					Age	−0.134	−4.438	<0.0001
Letter/number sequencing	0.223	0.209	16.258	<0.0001	FSIQ	0.102	6.033	<0.0001
					Age	−0.075	−3.94	<0.0001
					Education	−0.179	−2.279	0.024
Digit span forward	0.212	0.207	46.278	<0.0001	FSIQ	0.094	6.803	<0.0001
Digit span backwards	0.221	0.212	24.205	<0.0001	FSIQ	0.086	6.593	<0.0001
					Age	−0.039	−0.2363	0.019
Spatial span forwards	0.118	0.108	11.453	<0.0001	Age	−0.053	−3.863	<0.0001
					FSIQ	0.031	2.906	0.004
Spatial span backwards	0.216	0.202	15.609	<0.0001	Education	0.15	2.663	0.008
					Age	−0.052	−3.77	<0.0001
					FSIQ	0.028	2.318	0.022
Stroop	0.084	0.079	15.722	<0.0001	Education	0.793	3.965	<0.0001