Clinical features of subjects

Patient	Age (y)	Sex	Duration (y)	Cerebellar ataxia	Pyramidal signs	Parkinsonism	OH	Clinical diagnosis
1	67	M	4	+	−	+	2+	SDS
2	48	M	2	+	+	+	1+	SDS
3	58	M	6	+	+	+	1+	SDS
4	65	F	5	+	−	+	1+	SDS
5	66	F	1	+	+	+	−	OPCA
6	54	M	2	+	+	+	2+	OPCA
7	55	M	4	+	+	+	1+	SDS
8	62	M	2	+	−	+	2+	SDS
9	53	M	2	+	+	+	1+	OPCA
10	63	M	4	+	−	+	2+	SDS
11	54	M	5	+	+	+	1+	SND
12	49	F	1	+	+	+	1+	OPCA
13	59	F	1	+	+	+	−	OPCA

OPCA=olivopontocerebellar atrophy; SDS=Shy-Drager syndrome; SND=striatonigral degeneration; OH=orthostatic hypotension; −=absent; +=present; 1+=systolic blood pressure decreased by 30 mm Hg on standing; 2+=systolic blood pressure decreased by 50 mm Hg on standing.