The Three-Item Clock-Drawing Test: A Simplified Screening Test for Alzheimer’s Disease

2002 ◽  
Vol 49 (1) ◽  
pp. 53-58 ◽  
Author(s):  
Ker-Neng Lin ◽  
Pei-Ning Wang ◽  
Chien Chen ◽  
Yu-Hong Chiu ◽  
Chi-Chung Kuo ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Screening Test ◽  
Clock Drawing Test ◽  
Clock Drawing ◽  
Drawing Test

The Japanese version of the Rapid Dementia Screening Test is effective compared to the clock-drawing test for detecting patients with mild Alzheimer's disease

2015 ◽  
Vol 16 (4) ◽  
pp. 233-239 ◽  
Author(s):  
Yasushi Moriyama ◽  
Aihide Yoshino ◽  
Kaori Yamanaka ◽  
Motoichiro Kato ◽  
Taro Muramatsu ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Screening Test ◽  
Japanese Version ◽  
Clock Drawing Test ◽  
Clock Drawing ◽  
Dementia Screening ◽  
Drawing Test

scholarly journals Classifying Non-Dementia and Alzheimer’s Disease/Vascular Dementia Patients Using Kinematic, Time-Based, and Visuospatial Parameters: The Digital Clock Drawing Test

2021 ◽  
Vol 82 (1) ◽  
pp. 47-57 ◽  
Author(s):  
Anis Davoudi ◽  
Catherine Dion ◽  
Shawna Amini ◽  
Patrick J. Tighe ◽  
Catherine C. Price ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Vascular Dementia ◽  
Area Under The Curve ◽  
Clock Drawing Test ◽  
Digital Clock ◽  
Clock Drawing ◽  
Drawing Test ◽  
Dementia Patients ◽  
Optimal Area

Background: Advantages of digital clock drawing metrics for dementia subtype classification needs examination. Objective: To assess how well kinematic, time-based, and visuospatial features extracted from the digital Clock Drawing Test (dCDT) can classify a combined group of Alzheimer’s disease/Vascular Dementia patients versus healthy controls (HC), and classify dementia patients with Alzheimer’s disease (AD) versus vascular dementia (VaD). Methods: Healthy, community-dwelling control participants (n = 175), patients diagnosed clinically with Alzheimer’s disease (n = 29), and vascular dementia (n = 27) completed the dCDT to command and copy clock drawing conditions. Thirty-seven dCDT command and 37 copy dCDT features were extracted and used with Random Forest classification models. Results: When HC participants were compared to participants with dementia, optimal area under the curve was achieved using models that combined both command and copy dCDT features (AUC = 91.52%). Similarly, when AD versus VaD participants were compared, optimal area under the curve was, achieved with models that combined both command and copy features (AUC = 76.94%). Subsequent follow-up analyses of a corpus of 10 variables of interest determined using a Gini Index found that groups could be dissociated based on kinematic, time-based, and visuospatial features. Conclusion: The dCDT is able to operationally define graphomotor output that cannot be measured using traditional paper and pencil test administration in older health controls and participants with dementia. These data suggest that kinematic, time-based, and visuospatial behavior obtained using the dCDT may provide additional neurocognitive biomarkers that may be able to identify and tract dementia syndromes.

The Four-Point Scoring System for the Clock Drawing Test Does Not Differentiate between Alzheimer's Disease and Vascular Dementia

2010 ◽  
Vol 106 (3) ◽  
pp. 941-948 ◽  
Author(s):  
April R. Wiechmann ◽  
James R. Hall ◽  
Sid O'bryant
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Vascular Dementia ◽  
Sensitivity And Specificity ◽  
Scoring System ◽  
Cutoff Score ◽  
Characteristic Analysis ◽  
Clock Drawing Test ◽  
Clock Drawing ◽  
Drawing Test

The purpose of this study was to explore the sensitivity and specificity of the Clock Drawing Test by using a widely employed four-point scoring system to discriminate between patients with Alzheimer's disease or vascular dementia. Receiver operating characteristic analysis indicated that the Clock Drawing Test was able to distinguish between normal elders and those with a dementia diagnosis. The cutoff score for differentiating patients with Alzheimer's disease from normal participants was = 3. The cutoff score for differentiating those with vascular disease from normal participants was = 3. Overall, the four-point scoring system demonstrated good sensitivity and specificity for identifying cognitive dysfunction associated with dementia; however, the current findings do not support the utility of the four-point scoring system in discriminating Alzheimer's disease and vascular dementia.

Clock drawing test in institutionalized patients with schizophrenia compared with Alzheimer's disease patients

2003 ◽  
Vol 59 (2-3) ◽  
pp. 173-179 ◽  
Author(s):  
Vasilis P Bozikas ◽  
Mary H Kosmidis ◽  
Anastasios Kourtis ◽  
Katerina Gamvrula ◽  
Petros Melissidis ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Clock Drawing Test ◽  
Clock Drawing ◽  
Drawing Test ◽  
Institutionalized Patients

Does the Combination of the MMSE and Clock Drawing Test (Mini-Clock) Improve the Detection of Mild Alzheimer's Disease and Mild Cognitive Impairment?

2010 ◽  
Vol 22 (3) ◽  
pp. 889-896 ◽  
Author(s):  
Jesús Cacho ◽  
Julián Benito-León ◽  
Ricardo García-García ◽  
Bernardino Fernández-Calvo ◽  
José Luis Vicente-Villardón ◽  
...  
Keyword(s):  
Alzheimer’S Disease ◽  
Alzheimer's Disease ◽  
Cognitive Impairment ◽  
Mild Cognitive Impairment ◽  
Clock Drawing Test ◽  
Clock Drawing ◽  
Drawing Test
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