Cognitive Dysfunction after On-Pump Operations: Neuropsychological Characteristics and Optimal Core Battery of Tests

Table 3

Factor analysis of changes of non-verbal neuropsychological variables in the combined subject group.

Neuropsychological variables	Factor I	Factor II	Factor III
	Non-verbal memory	Psychomotor speed	Visuo-spatial analysis
% of variance	22.2	19.7	19.5
Benton Non-verbal Memory Test	0.798 **	—	—
MMSE	0.806 **	—	—
Digit Symbol Test	—	−0.678 **	—
TMT A	—	0.686 **	—
TMT B	—	0.289*	0.719 **
Block Design test	—	—	−0.724 **

∗Significant Pearson’s correlations between neuropsychological variables and extracted factors, P < 0.05.
∗∗Correlations between neuropsychological variables and extracted factors, P < 0.001.