Table 6.

Prevalence (%) of parkinsonian symptoms in elderly populations, with and without parkinsonism, from screening questionnaire studies and current* study.

Total Populations
	Current		Mutch [4]	Pramstaller [5]	Rocca [6]	Teresi [7]
Number of Subjects	6771	4768	87	36	16	164
Age (Years)	<65	>65	71–76	40+	62–96	65+
Symptom
Arms or legs ever shake?			5.0	35.0	6.2
Resting Tremor	3.8	5.0				9.9
Shuffle feet			3.0	8.3	31.2	10.1
Feet suddenly freeze in doorways				2.8	6.2
Poor balance			10.0	27.8	37.5
Difficulty Walking	4.7	3.8
Walking Slower	22.1	50.7				3.8#
Trouble rising from chair	6.4	6.4	13.0	13.9	37.5	21.4
Micrographia	6.0	13.9	14.0	5.6	12.5	13.2
Olfactory dysfunction	7.7	11.3
Patients with Parkinsonism
	Current	Duarte [28]	Meneghini [31]	Mutch [4]	Pramstaller [5]	Rocca [6]
Number of Subjects	53	36	21	35	40	37
Age (Years)	46–81	30–89	40+	57–89	40+	58–94
Symptom
Arms or legs ever shake?		89.1	76.2	77.0	65.0	64.9
Resting Tremor	49.1
Shuffle feet		72.9		51.0	82.5	67.6
Feet suddenly freeze in doorways		51.3			52.5	56.8
Poor balance		83.7		69.0	75.0	81.1
Difficulty Walking	35.9
Walking Slower	84.9
Trouble rising from chair	39.6	59.0		66.0	67.5	75.7
Micrographia	73.6	64.8		74.0	90.0	73.0
Olfactory dysfunction	34.0

*Current study including only the individuals who answered all symptoms questions (N = 11 539)

# Interviewer observation