Clock-face drawing, reading and setting tests in the screening of dementia in Chinese elderly adults

Linda Chiu Wa LAM*, Helen Fung Kum CHIU, Kei On NG, Calais CHAN, Wah Fat CHAN, Siu Wan LI, Mary WONG

*Corresponding author for this work

Research output: Journal PublicationsJournal Article (refereed)peer-review

74 Citations (Scopus)

Abstract

Comprehensive neuropsychological batteries focus on the subtle cognitive deficits in dementia, but a brief screening instrument is also of immense practical value. As the clock-drawing test encompasses a number of cognitive domains frequently disturbed by the dementing process, it is considered to be a suitable screening instrument for the disorder. We documented the usefulness of a new scoring method of the clock-drawing test for screening of dementia in the elderly Chinese in Hong Kong. Fifty-three demented individuals and 53 healthy elderly controls were assessed. At a cutoff score of 3/4 , the sensitivity and specificity of the clock-drawing test in screening of dementia was 83% and 79%. With a composite test of clock reading and clock setting, the positive predictive value of the clock face test was 98%. This new scoring method of clock-drawing proved to be a valid measure for screening of dementia. It is applicable in non-English speaking populations and should be a useful adjunct for quick screening assessment of dementia.

Original languageEnglish
Pages (from-to)353-357
Number of pages5
JournalJournals of Gerontology - Series B Psychological Sciences and Social Sciences
Volume53B
Issue number6
DOIs
Publication statusPublished - Nov 1998
Externally publishedYes

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