Clock Drawing Test in Mild Cognitive Impairment: Quantitative Analysis of Four Scoring Methods and Qualitative Analysis

Dementia and Geriatric Cognitive Disorders - Tập 26 Số 6 - Trang 483-489 - 2008
Kang Soo Lee1, Eun A Kim2, Chang Hyung Hong3, Dong Soo Lee4, Byoung Hoon Oh1, Hae‐Kwan Cheong5
1Department of Psychiatry, Yonsei University College of Medicine,
2Occupational Safety and Health Research Institute, Korea Occupational Safety and Health Agency, Incheon
3Department of Psychiatry, Ajou University School of Medicine, and
4Department of Neuropsychiatry, College of Medicine, Inje University, Sanggye Paik Hospital, Seoul,
5Department of Social and Preventive Medicine, Sungkyunkwan University School of Medicine, Suwon, Korea

Tóm tắt

<i>Background:</i> The role of the clock drawing test (CDT) as a screening tool for dementia has been evaluated. However, studies focusing on mild cognitive impairment (MCI) are still lacking. The purpose of this study was to verify the validity of the CDT as a screening method for MCI. <i>Methods:</i> 524 subjects aged 60 years and older were recruited in the community. Of these, 241 were diagnosed as not cognitively impaired (NCI) and 224 were classified as MCI. The CDT was scored according to the Freedman, Rouleau, Todd, and CERAD CDT and an additional comprehensive scoring system incorporating elements of most CDT for qualitative analysis. <i>Results:</i> The sensitivity and specificity of the 4 CDT scoring systems for MCI ranged from 40.7 to 56.4% and from 71.8 to 85.3%, respectively. The likelihood ratio and the positive and negative predictive values of the 4 CDT ranged from 18 to 29, 18.2 to 24.5 and from 55.9 to 78.4%, respectively. In qualitative analysis, a significantly lower performance in the clock numbers category was observed in the MCI group. <i>Conclusion:</i> This study suggests that although some qualitative analyses could help in identifying MCI individuals, the CDT is insufficient as a screening method to distinguish MCI individuals from NCI individuals in a clinical setting.

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Thông tin xuất bản

Dementia and Geriatric Cognitive Disorders

Tập 26 Số 6

483-489

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