Table 2

Varimax-rotated component matrix from principal component analysis

Syndrome dimension 1Syndrome dimension 2Syndrome dimension 3Syndrome dimension 4Syndrome dimension 5Syndrome dimension 6
Disinhibition0.73990.0774−0.0790−0.1423−0.15760.1102
Apathy0.54860.07630.42760.1221−0.19190.1450
Loss of sympathy or empathy0.70220.12780.0044−0.0981−0.12780.0205
Stereotyped/compulsive behaviour0.57890.2890−0.3103−0.1798−0.05360.2444
Hyperorality/dietary change0.62340.0459−0.2198−0.1270−0.09320.0705
Executive dysfunction0.54580.14400.1176−0.0176−0.04760.3155
CBIR—Abnormal behaviour0.74970.1251−0.0348−0.0545−0.0898−0.3164
CBIR—Mood0.54850.10130.00390.1709−0.00770.5067
CBIR—Eating habits0.76470.0394−0.0486−0.0500−0.0074−0.2188
CBIR—Sleep0.4569−0.02590.28130.1776−0.04880.4043
CBIR—Motor behaviour0.7056−0.0161−0.1997−0.11740.0726−0.2513
CBIR—Motivation0.70750.29810.15110.0500−0.1157−0.1488
ACER—Attention/orientation−0.15100.90020.09220.0463−0.02480.0724
ACER—Memory−0.11240.82580.34100.1746−0.04400.0770
ACER—Fluency−0.17840.75760.11830.1772−0.0744−0.1227
ACER—Language−0.08050.84600.34050.13370.03140.0238
ACER—Visuospatial−0.05320.8299−0.1642−0.1818−0.04600.1518
CBIR—Memory0.48640.5544−0.2152−0.03920.0199−0.3158
CBIR—Everyday skills0.40860.52140.33090.31980.0727−0.1291
Symmetrical parkinsonism0.0127−0.04150.7676−0.36730.0655−0.0362
Axial rigidity−0.0156−0.11580.80770.0425−0.02310.0669
Poor levodopa responsiveness−0.1307−0.10570.67570.0873−0.0629−0.0536
Postural instability−0.0504−0.10690.77190.1690−0.0640−0.0241
Supranuclear gaze palsy−0.0938−0.11440.81320.1045−0.04730.0526
CBIR—Self care0.34590.39960.45240.3626−0.0628−0.0775
Impaired semantics0.15100.30670.5187−0.23770.03530.1970
Asymmetrical parkinsonism−0.0652−0.08430.07000.8343−0.06270.0202
Asymmetrical dystonia0.0282−0.06730.08990.8300−0.05500.1061
Asymmetrical myoclonus−0.0340−0.0148−0.04930.68300.10120.0621
Limb apraxia−0.1292−0.05900.12520.52740.5056−0.0233
Cortical sensory loss−0.1462−0.02010.05840.56350.2569−0.2505
Alien limb syndrome−0.0363−0.00660.05040.54230.0749−0.1367
Symmetrical myoclonus−0.0658−0.03500.0044−0.00930.5132−0.3228
Agrammatic, apraxic speech−0.12240.1231−0.03690.11370.76670.2703
Logopenic speech−0.06590.0268−0.1180−0.04610.77520.0415
CBIR—Beliefs0.18300.23580.0220−0.00190.00930.5919
Symmetrical dystonia0.11340.11760.3325−0.17410.20100.0008
Orobuccal apraxia−0.1225−0.0170−0.00120.28220.3727−0.0267
Visuospatial deficits−0.18630.1862−0.01060.23860.3650−0.2559
Motor neuron disease0.2615−0.1304−0.1584−0.0617−0.16830.0556
  • Positive loadings indicate worse performance or presence of symptoms, except for ACER where negative loadings indicate worse performance. Factor loadings above 0.4 or below −0.4 shown in bold.

  • ACER, Addenbrooke’s Cognitive Examination - Revised; CBIR, Cambridge Behavioural Inventory - Revised.