Table 4.

The correlation of Fatigue score and regions of interest volume.

Sig. P	Parkinson's disease		Non-Parkinson's disease
	Fatigue Severity Scale_total	Fatigue Severity Scale Controlled total intracranial volume, BDI-II, Age, Mini-Mental State Examination	Fatigue Severity Scale_total	Fatigue Severity Scale Controlled total intracranial volume, BDI, Age, Mini-Mental State Examination
Caudate	0.004⁎⁎	0.002⁎⁎	0.665	0.920
Insula	0.019⁎	0.081	0.516	0.392
Putamen	0.002⁎⁎	0.004⁎⁎	0.527	0.534
anterior cingulate cortex	0.832	0.602	0.131	0.180
Caudal anterior cingulate cortex	0.842	0.462	0.302	0.405
Nucleus accumbens	0.338	0.904	0.986	0.659
Dorsolateral prefrontal cortex	0.973	0.739	0.078	0.052

^⁎P < 0.05.

^⁎⁎P < 0.005.