Table 3. Motor and cognitive progression for the D- and F-types.

	D-type	F-type	p
Disease duration without motor symptoms, months†	46.3±30.1 (17)	61.0±27.1 (24)	0.008*
K-MMSE score at follow-up‡	18.4±7.8 (30)	11.3±8.7 (38)	0.010*

Data are mean±SD (n) values.

^*p<0.05, ^†Multiple linear regressions were performed after controlling for age at onset, sex, UPDRS Part III score at baseline, and disease duration at the time of MRI scanning across the subtypes, ^‡Repeated-measures ANOVA was performed after controlling for duration from onset to final follow-up.

K-MMSE: Korean Mini Mental State Examination, UPDRS: Unified Parkinson's Disease Rating Scale.