Table 3.

Proportion of participants whose scores improved over 1 year vs. declined or remained at baseline level.

Composite	Sex		Ethnicity		Family History		Positive	Negative
	χ2	p	χ2	p	χ2	p	N	N	χ2	p	Direction
Accuracy Composites
General Ability	0.3020	0.5827	1.8207	0.4024	0.0000	1.0000	359	277	5.0524	0.0246	p > n
Abstraction	0.2806	0.5963	1.6759	0.4326	0.0000	1.0000	416	216	31.8123	0.0000	p > n
Attention	1.6138	0.2040	1.0978	0.5776	0.8096	0.3682	390	256	13.6327	0.0002	p > n
Emotion	1.9709	0.1604	2.8611	0.2392	1.4513	0.2283	372	271	7.6686	0.0056	p > n
Episodic Memory	0.1082	0.7422	1.3535	0.5083	0.0000	1.0000	464	177	66.7009	0.0000	p > n
Working Memory	0.9413	0.3320	3.0795	0.2144	0.1218	0.7271	387	253	13.7633	0.0002	p > n
Balance	0.0155	0.9008	0.4385	0.8031	0.0417	0.8381	302	329	0.4955	0.4815	p < n
Total	0.0432	0.8353	0.8946	0.6394	0.0000	1.0000	442	163	66.9731	0.0000	p > n
Speed Composites
General Ability	0.0022	0.9624	1.3484	0.5096	0.0005	0.9829	377	264	9.6860	0.0019	p > n
Abstraction	3.8785	0.0489	1.9744	0.3726	0.0219	0.8823	382	250	13.5177	0.0002	p > n
Attention	0.0011	0.9730	0.7426	0.6898	0.1259	0.7227	273	370	7.0580	0.0079	p < n
Emotion	1.1767	0.2780	0.9811	0.6123	0.0220	0.8821	422	219	32.3245	0.0000	p > n
Episodic Memory	0.5667	0.4516	6.7139	0.0348	0.0000	1.0000	451	190	54.5878	0.0000	p > n
Working Memory	0.0565	0.8121	1.7275	0.4216	0.9688	0.3250	342	298	1.3798	0.2401	p > n
Motor	0.7884	0.3746	0.2895	0.8653	0.5489	0.4588	441	184	54.3160	0.0000	p > n
Total	0.6824	0.4088	1.0231	0.5996	1.4056	0.2358	394	209	28.4378	0.0000	p > n

Family-wise Bonferroni correction for 8 comparisons = 0.0063 (α = 0.05, 2-tailed).