Characteristics of clock drawing test (CDT) errors by the dementia type: quantitative and qualitative analyses.
We wanted to define the characteristics of errors on the clock drawing test (CDT) and we also wanted to determine their value for making the early diagnosis of dementia, so the performance of patients with three types of dementia on the four CDT was evaluated. The patients with subcortical vascular dementia (VaD) and patients with Parkinson's disease with dementia (PDD) had more stimulus bound responses. Patients with Alzheimer disease (AD) made significantly more conceptual deficit (CD) errors. The CD correlated with the severity of dementia and it could be detected in the early and mild stage of dementia. Qualitative and quantitative analyses of the errors on the CDT might be useful for making the early differential diagnosis of dementia types.
Department of Neurology, Chungnam University Hospital, 640 Daesa-dong, Joong-ku, Daejon 301-721, Republic of Korea. aelee@cnu.ac.kr
Ae Young
AY
Lee
Ji Seon
JS
Kim
Byung Hee
BH
Choi
Eun Hee
EH
Sohn
D000368:Aged; D003704:Dementia / Q000175:diagnosis* / Q000523:psychology; D003937:Diagnosis, Differential; D005260:Female; D006801:Humans; D008297:Male; D011446:Prospective Studies; D011594:Psychometrics / Q000379:methods*; D015203:Reproducibility of Results; D012720:Severity of Illness Index; D013647:Task Performance and Analysis