Table 1.

Patient clinical characteristics. Abbreviations: H&Y = Hoehn & Yahr; UPDRS = Unified Parkinson's Disease Rating Scale; LED = levodopa equivalent dose. ^aWearing off and/or dyskinesia.

Group	Number	Disease duration (yrs)	H&Y (stage)	UPDRS (part III score)	LED (mg/day)	Motor complicationsa (yes/no)
Early	39	1.6 ± 0.9	1.4 ± 0.4	14.6 ± 5.8	150.1 ± 151.3	0/39
Moderate/advanced	47	8.8 ± 6.7	2.5 ± 0.7	27.6 ± 11.6	580.9 ± 214	31/16