Apathy and Anhedonia in Parkinson's Disease

Table 2

Values of the prevalence rate of depression occurring along with PD.

	Author	𝑛	Depressed state	Major depression	Dysthymia
1986	Santamaria	34	32.3	2.9	29.4
1988	Mayeux	339	47
1990	Brown	40	25
2000	Cubo	88	7.3	7.3
2000	Goladi	172	33
2003	Krishnan	126	12.7
1995	Tison	60	32.7
2001	Happe	56	76.4
2001	Shulman	99	36
2002	Happe	116	37.1
2002	Marinus	177	38.4
2002	Shilman	101	44
2003	Roji	353	56.9
2005	Hely	52	53.6
2005	Holroyd	100	15
2005	Prado	60	38.3
2006	Kirsch-Darrow	80	26.3
2006	Weintraub	130	36.2