Computer-aided cognitive training combined with tDCS can improve post-stroke cognitive impairment and cerebral vasomotor function: a randomized controlled trial

Table 4 Intragroup and intergroup comparisons of IADL scores in the four groups

Groups		IADL			within group Difference¹		P (Between- Groups Difference²)
Groups		Pre	Post	Diff	T	P	Comparing to group 1	Comparing to group 4
CCT group		6.00(2.50,6.00)	6.00(3.75,8.00)	0.00(0.00,2.00)	-2.399	0.016*	-	< 0.0001*
tDCS group		5.50(1.75,11.00)	8.50(6.00,13.25)	3.00 (0.00,4.25)	-3.192	0.001*	0.113	< 0.0001*
CACT group		6.00(2.75,9.75)	7.00(3.00,12.00)	1.00 (0.00,2.00)	-2.654	0.008*	1.000	0.022*
CACT + tDCS group		5.50(3.00,11.50)	17.00(9.00,22.50)	5.50(3.75,14.00)	-3.73	< 0.0001*	< 0.0001*	-
Between groups³	H	1.66	5.986	32.262
Between groups³	P	0.203	0.002*	< 0.0001*

CCT: conventional cognitive training; tDCS: transcranial direct current stimulation; CACT: computer-aided cognitive training; Diff: difference; group1: CCT group; group 4: CACT combined with tDCS group;
¹ Wilcoxon signed-rank test; ² Bonferroni post hoc test; ³ Kruskal‒Wallis H test
* Statistically significant (P < 0.05)

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