Table 1.

Characteristics of the study population

	Idiopathic Parkinson’s disease n/mean age in years	Secondary Parkinsonism n/mean age in years	Controls n/mean age in years	Total (n)
Females	36/74	21/70	36/78	93/74
Males	37/72	32/74	23/76	92/74
Total	73/73	53/71	59/77	185/74
	Durationa	Durationa
Total	6/(4/9)	4/(2/6)	–

Note:

^aValues are given as medians/25th and 75th percentiles.