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Centre for Policy on Ageing | |
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Comparing clock tests for dementia screening
— naive judgments vs formal systems - what is optimal? | | Author(s) | James M Scanlan, Michael Brush, Christina Quijano |
| Journal title | International Journal of Geriatric Psychiatry, vol 17, no 1, January 2002 |
| Pages | pp pp 14-23 |
| Keywords | Dementia ; Assessment procedures for mental patients ; United States of America. |
| Annotation | Clock drawing tests (CDTs) vary in format, scoring and complexity. 80 clock drawings, by subjects of known dementia status, were selected: 20 from each of four CERAD (Consortium to Establish a Registry for Alzheimer's Disease) categories defined as normal, mild, moderate and severe. In addition, 20 naive raters judged clocks as either normal or abnormal, without formal instruction. Naive and formal CDT systems showed 90%-100% agreement with normal, moderate and severe categories, but poor agreement (mean 39%) for mildly impaired drawings. When CDT systems were compared for accurate dementia classification, the Mendex and CERAD systems correctly identified the greatest proportion of subjects (85%) and Wolf-Klein the smallest (58%). The better systems correctly identified >70% of mildly demented individuals. In contrast, medical records from patients' personal physicians correctly identified only 24% of the mildly demented. Strikingly, naive raters' CDT judgements were as effective as five of the seven CDT systems in dementia identification. (RH). |
| Accession Number | CPA-020212211 A |
| Classmark | EA: DA:4C: 7T |
Data © Centre for Policy on Ageing |
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| ...from the Ageinfo database published by Centre for Policy on Ageing. |
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