Klaus Schmidtke1, Susanne Olbrich. 1. Center for Geriatric Medicine and Gerontology Freiburg, University Hospital Freiburg, Germany.
Abstract
BACKGROUND: The 12-item Clock Reading Test (CRT) allows a fine-graded assessment of clock-reading ability. It has a strong focus on visuo-spatial processing and requires no executive processing. This study evaluated the reliability, validity, sensitivity and specificity of the CRT for the diagnosis of dementia and visuo-spatial dysfunction. METHODS: The CRT, the Clock Drawing Test (CDT) and other tests were applied to groups of 200 subjects with dementia, 105 subjects with mild cognitive impairment (MCI), 20 subjects with focal parietal lesions and 64 elderly control subjects. RESULTS: The CRT was found to be reliable and sensitive for the detection of cognitive impairment in parietal lesions, Alzheimer-, mixed- and Lewy Body dementia. Normal subjects and patients with MCI, frontotemporal dementia or cerebral small vessel disease showed little or no impairment. CONCLUSION: CRT and CDT are clock-processing tests with different demand profiles. They can supplement each other in the neuropsychological diagnosis of dementia and visuo-spatial dysfunction.
BACKGROUND: The 12-item Clock Reading Test (CRT) allows a fine-graded assessment of clock-reading ability. It has a strong focus on visuo-spatial processing and requires no executive processing. This study evaluated the reliability, validity, sensitivity and specificity of the CRT for the diagnosis of dementia and visuo-spatial dysfunction. METHODS: The CRT, the Clock Drawing Test (CDT) and other tests were applied to groups of 200 subjects with dementia, 105 subjects with mild cognitive impairment (MCI), 20 subjects with focal parietal lesions and 64 elderly control subjects. RESULTS: The CRT was found to be reliable and sensitive for the detection of cognitive impairment in parietal lesions, Alzheimer-, mixed- and Lewy Body dementia. Normal subjects and patients with MCI, frontotemporal dementia or cerebral small vessel disease showed little or no impairment. CONCLUSION: CRT and CDT are clock-processing tests with different demand profiles. They can supplement each other in the neuropsychological diagnosis of dementia and visuo-spatial dysfunction.
Authors: Johannes Carolus Magnus Schlachetzki; Klaus Schmidtke; Jan Beckervordersandforth; Wiktor Borozdin; Christian Wilhelm; Michael Hüll; Jürgen Kohlhase Journal: J Neurol Date: 2009-07-19 Impact factor: 4.849
Authors: Ma Shwe Zin Nyunt; Chang Yuan Soh; Qi Gao; Xinyi Gwee; Audrey S L Ling; Wee Shiong Lim; Tih Shih Lee; Philip L K Yap; Keng Bee Yap; Tze Pin Ng Journal: Front Med (Lausanne) Date: 2017-12-18