Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults
Aims: To test the hypotheses that performance on a clock-drawing task (CDT) diminishes over time and that poor performance is associated with development of dementia and reduced survival. Methods: Participants in the population-based Leisure World Cohort Study were asked to complete a CDT in follow-...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Karger Publishers
2011-04-01
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| Series: | Dementia and Geriatric Cognitive Disorders Extra |
| Subjects: | |
| Online Access: | http://www.karger.com/Article/FullText/326781 |
| _version_ | 1818118215766638592 |
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| author | Annlia Paganini-Hill Linda J. Clark |
| author_facet | Annlia Paganini-Hill Linda J. Clark |
| author_sort | Annlia Paganini-Hill |
| collection | DOAJ |
| description | Aims: To test the hypotheses that performance on a clock-drawing task (CDT) diminishes over time and that poor performance is associated with development of dementia and reduced survival. Methods: Participants in the population-based Leisure World Cohort Study were asked to complete a CDT in follow-up questionnaires mailed in 1992 and 1998. Dementia status was determined using in-person evaluations, follow-up questionnaires, hospital data, and death certificates. Results: Of the 4,842 cohort members (mean age 80 years) who completed the CDT in 1992, 1,521 also completed it in 1998. Although performance in the CDT diminished over time in only a proportion of the cohort, the mean total score and the percentage of subjects with correctly drawn clocks decreased with each successive 5-year age group (p = 0.0001) and over time. Mean scores were lower in non-demented subjects later identified as demented compared with those who remained free of dementia. A low CDT score in 1992 was associated with a 28% increased risk of dementia and 13% reduced survival. Conclusion: A CDT may help predict cognitive decline and future disability in the elderly. Identification of high-risk individuals using a CDT may lead to earlier diagnosis and treatment and improved patient management. |
| first_indexed | 2024-12-11T04:50:46Z |
| format | Article |
| id | doaj.art-fb3209e1df6e43c1a98beb997e996aaa |
| institution | Directory Open Access Journal |
| issn | 1664-5464 |
| language | English |
| last_indexed | 2024-12-11T04:50:46Z |
| publishDate | 2011-04-01 |
| publisher | Karger Publishers |
| record_format | Article |
| series | Dementia and Geriatric Cognitive Disorders Extra |
| spelling | doaj.art-fb3209e1df6e43c1a98beb997e996aaa2022-12-22T01:20:24ZengKarger PublishersDementia and Geriatric Cognitive Disorders Extra1664-54642011-04-0111758310.1159/000326781326781Longitudinal Assessment of Cognitive Function by Clock Drawing in Older AdultsAnnlia Paganini-HillLinda J. ClarkAims: To test the hypotheses that performance on a clock-drawing task (CDT) diminishes over time and that poor performance is associated with development of dementia and reduced survival. Methods: Participants in the population-based Leisure World Cohort Study were asked to complete a CDT in follow-up questionnaires mailed in 1992 and 1998. Dementia status was determined using in-person evaluations, follow-up questionnaires, hospital data, and death certificates. Results: Of the 4,842 cohort members (mean age 80 years) who completed the CDT in 1992, 1,521 also completed it in 1998. Although performance in the CDT diminished over time in only a proportion of the cohort, the mean total score and the percentage of subjects with correctly drawn clocks decreased with each successive 5-year age group (p = 0.0001) and over time. Mean scores were lower in non-demented subjects later identified as demented compared with those who remained free of dementia. A low CDT score in 1992 was associated with a 28% increased risk of dementia and 13% reduced survival. Conclusion: A CDT may help predict cognitive decline and future disability in the elderly. Identification of high-risk individuals using a CDT may lead to earlier diagnosis and treatment and improved patient management.http://www.karger.com/Article/FullText/326781Clock drawingCognitive functionCognitive impairmentCohort studyDementiaElderlyLongitudinal assessmentMortalityPopulation-based study |
| spellingShingle | Annlia Paganini-Hill Linda J. Clark Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults Dementia and Geriatric Cognitive Disorders Extra Clock drawing Cognitive function Cognitive impairment Cohort study Dementia Elderly Longitudinal assessment Mortality Population-based study |
| title | Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults |
| title_full | Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults |
| title_fullStr | Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults |
| title_full_unstemmed | Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults |
| title_short | Longitudinal Assessment of Cognitive Function by Clock Drawing in Older Adults |
| title_sort | longitudinal assessment of cognitive function by clock drawing in older adults |
| topic | Clock drawing Cognitive function Cognitive impairment Cohort study Dementia Elderly Longitudinal assessment Mortality Population-based study |
| url | http://www.karger.com/Article/FullText/326781 |
| work_keys_str_mv | AT annliapaganinihill longitudinalassessmentofcognitivefunctionbyclockdrawinginolderadults AT lindajclark longitudinalassessmentofcognitivefunctionbyclockdrawinginolderadults |