Clinical and neuroimaging correlates of abnormal short-latency Somatosensory Evoked Potentials in elderly vascular dementia patients: A psychophysiological exploratory study

Table 6 Factor analysis (principal components analysis) of results with varimax normalized rotation. The two-factor model explains 79% of variance

	Factor 1	Factor 2	Factor 3
N13 latency	0.40	*0.86*	0.18
N13 amplitude	-0.12	*-0.89*	-0.34
N19 latency	*0.67*	*0.68*	0.25
N19 amplitude	-0.32	-0.36	*-0.75*
N13-19 latency	*0.83*	0.34	0.25
P27 latency	*0.90*	0.25	0.28
P27 amplitude	-0.42	-0.23	*-0.68*
N11-P27 latency	*0.87*	0.30	0.24
Severity of dementia	*0.66*	0.18	0.61
Cortical lesions in MRI	0.17	0.17	*0.87*
Subcortical lesions in MRI	*0.83*	0.12	0.33
Explained Variable	4.29	2.51	2.67
Proportion of total variance	39%	23%	24%
Total variance explained			86%

ISSN: 1744-859X