TABLE 3.

Associations between other characteristics and magnitude of repeatable battery for the assessment of neuropsychological status (RBANS) practice effects (N = 502).

Characteristics	No. of participants	Increase of total scale (95% CI)	P-value	Increase of immediate memory index (95% CI)	P-value	Increase of delayed memory index (95% CI)	P-value
Age (years)			0.565		0.146		0.009
60–69	208	4.1 (3.0, 5.2)		6.8 (5.3, 8.2)		2.0 (0.8, 3.2)
70–85	294	3.7 (2.8, 4.6)		8.1 (6.9, 9.3)		4.2 (3.1, 5.2)
Sex			0.018		0.002		0.712
Male	248	3.0 (2.0, 4.0)		6.1 (4.8, 7.4)		3.1 (2.0, 4.2)
Female	254	4.7 (3.7, 5.7)		9.0 (7.7, 10.2)		3.4 (2.3, 4.6)
APOE-ε4			0.164		0.004		0.337
Carrier	192	3.2 (2.1, 4.4)		5.9 (4.4, 7.3)		3.8 (2.5, 5.0)
Non-carrier	310	4.3 (3.4, 5.2)		8.6 (7.5, 9.8)		3.0 (2.0, 4.0)
Initial RBANS score			0.002		< 0.001		< 0.001
Higher than mean level	238	2.7 (1.6, 3.7)		4.7 (3.5, 6.0)		0.9 (–0.2, 1.9)
Lower than mean level	264	5.0 (4.0, 5.9)		10.7 (9.3, 12.0)		6.2 (5.0, 7.4)

RBANS, Repeatable Battery for the Assessment of Neuropsychological Status; CI, confidence interval. Estimates were adjusted for age, sex, education level, APOE-ε4 carriage and initial RBANS level, where applicable.