Demographic and clinical characteristics of study cohort.

Maximum score for each test in brackets where applicable.*p**p***pn/s = not significant; n/a = not applicable; bvFTD = behavioural-variant frontotemporal dementia; SD = semantic dementia; AD = Alzheimer's disease; FRS = Frontotemporal Dementia Functional Rating Scale; ACE-R = Addenbrooke's Cognitive Examination Revised; RAVLT = Rey Auditory Verbal Learning Test; RCF = Rey Complex Figure. FRS data not available for 1 AD patient; Trails data available for 9 AD, 10 bvFTD patients, and 13 Controls; Naming data available for 13 Controls; Comprehension data available for 9 bvFTD patients and 13 Controls; RAVLT not administered in SD patients due to the high verbal loading of the task; RCF recall data available for 10 bvFTD and 9 SD patients; Letter fluency data available for 14 AD patients.Demographic and clinical characteristics of study cohort.