Table 2.

Frequency of clinical type of Armstrong’s criteria in patients with CBD

	CBD (n = 32)
Clinical type	At presentation	During the entire course
Probable CBS	1/28 (4)	1/25 (4)
Possible CBS	7/22 (32)	11/23 (46)
FBS	12/25 (48)	14/22 (64)
naPPA	1/27 (4)	2/21 (10)
Progressive supranuclear palsy syndrome	13/27 (48)	21/25 (84)

Data are presented as n (%). CBD, corticobasal degeneration; CBS, corticobasal syndrome; FBS, frontal behavioural–spatial syndrome; naPPA, non-fluent/agrammatic variant of primary progressive aphasia.