Table 2.

Mean cognitive scores ± SD and significance levels of factor Session

	Session			p-value (session)
	1	2	3	1–2	2–3	1–3
Verbal short-term memory	46 ± 3.8	40 ± 9.5	49 ± 6.9	0.03	0.000	0.14
Verbal long-term memory	9.2 ± 1.8	6.4 ± 3.0	9.6 ± 2.8	0.008	0.000	0.41
Visual-spatial long-term memory	22.8 ± 6.3	28.2 ± 4.5	26.0 ± 3.9	0.004	0.05	0.07
Sustained attention	378 ± 89	421 ± 100	435 ± 102	0.02	0.45	<0.002

Higher test scores indicate better performance