. Author manuscript; available in PMC: 2013 Oct 1.

Published in final edited form as: Mov Disord. 2012 Oct;27(12):1513–1521. doi: 10.1002/mds.25175

Table 2.

Duration of PD and Dopaminergic Therapy Use

	N Observations	Mean	SD
Yrs since PD Symptom Onset	1741	3.3	2.2
Yrs since PD Diagnosis	1741	1.5	1.1
Length of Time on Dopaminergic Therapy (yrs)	1741	0.82	0.7
Levodopa-equivalency total daily dose (mg)⁵²	1740	380.3	232.9
PD therapy use, N=1740		Frequency	Percent
	Levodopa alone	506	29.1%
	Dopamine Agonist alone	463	26.6%
	More than one PD medication^*	772	44.3%

Includes use of levodopa, dopamine agonist, or other PD medications for which there is an established levodopa-equivalency⁵².