Anales de la Facultad de Medicina
versión impresa ISSN 1025-5583
OSCANOA, Teodoro. Clock drawing test in Alzheimer disease screening. An. Fac. med. [online]. 2004, vol.65, n.1, pp. 42-48. ISSN 1025-5583.
Objetive: To determine the value of the clock drawing test as a assessment tool for Alzheimers disease in elderly patients. Material and Methods: The clock drawing test was applied to patients with and without Alzheimers disease attended at the Almenara Hospital Geriatrics Department, Lima Perú. The sample consisted in 31 outpatients (10 males, 21 women) with Alzheimers disease and 31 outpatients without this disease (21 males, 10 women). They were requested to draw a clock, using standardized instructions (ten-point clock drawing test ). Patient with Alzheimers disease were graded according to the Hughes Clinical Dementia Rating (mild in 10, moderate in 12 and severe in 9). Results: Using a 6-point score as cut off the ten-point clock drawing test had a sensitivity of 83,9%, specificity of 93,5, positive predictive value of 92,9% and negative predictive value 83,5%. Conclusions: The ten-point clock test appears as a simple and effective test for the initial assessment of cognitive functions in elderly patients with suspected Alzheimers disease dementia.
Palabras llave : Dementia, senile; Alzheimer disease; geriatrics; frail elderly.