Table 3.

Principal component analysis of motor symptoms in all mutation carriers and in the individual genetic mutation groups

	All mutation carriers	C9orf72	GRN
Component	1	1	1
Dysarthria	0.86	0.84	0.86
Dysphagia	0.86	0.82	0.90
Tremor	0.75	0.72	0.81
Slowness	0.92	0.91	0.95
Weakness	0.89	0.89	0.88
Gait disorder	0.96	0.96	0.95
Falls	0.90	0.94	0.78
Functional difficulties using hands	0.94	0.93	0.95
Proportion of variance explained by component	0.79	0.77	0.78