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%

Tsiptsios et al. Annals of General Hospital Psychiatry 2003 2:8   doi:10.1186/1475-2832-2-8