Table 1.

Demographics of the tremor dominant (TD) and postural instability and gait difficulty (PIGD) groups (mean ± standard deviation—SD). MDS-UPDRS: Movement Disorder Society Unified Parkinson’s Disease Rating Scale.

	TD (n = 13)	PIGD (n = 23)
Gender (F:M)	0:13	9:14
Age (years)	59.92 ± 9.63 (34–71)	70.43 ± 6.18 (59–81)
Disease duration (months)	20.23 ± 19.14 (4–60)	37.78 ± 54.69 (1–216)
MDS-UPDRS III (ON)	14.85 ± 9.85	15.08 ± 8.48