Neuropsychological assessment of patients with dementia necessitates the use of varied memory tasks designed to measure different memory processes, including information memorization, retention and retrieval. A valid memory battery should be demonstrated to discriminate between demented and non-demented subjects and its scores should be related to the degree of intellectual impairment. The objective of this study was to evaluate the potential usefulness of Choynowski's Memory Scale in assessment of patients with dementia.
Material and methods
Thirty-two patients with dementia and 64 age- and gender- matched healthy controls took part in the study. All participants were examined by means of Choynowski's Memory Scale, and the patients were additionally assessed by the Mini Mental State Examination and Clock Drawing Test (CDT).
All subtests of Choynowski's Memory Scale were found to highly significantly (p ≤ 0.001) discriminate between patients with dementia and healthy controls. Except for Digit Span, all other subtests of Choynowski's battery were highly correlated with the global mental status as assessed by MMSE with correlation coefficients ranging from 0.59 to 0.81. Most subtests of Choynowski's Memory Scale were also moderately or highly correlated with performance on the CDT, and the correlations coefficients between the total score on Memory Scale and the CDT were r = 0.66 and r = 0.61 (p ≤ 0.001) for the free recall drawing and copying, respectively.
Choynowski's Memory Scale showed high discriminative properties and strong associations with the degree of intellectual impairment in dementia. The results encourage the use of this battery in clinical settings.
Keywords: memory assessment, clock drawing test, dementia diagnosis, Alzheimer disease, vascular dementia