The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease

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The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease. / Jørgensen, Kasper; Kristensen, Maria K; Waldemar, Gunhild; Vogel, Asmus.

I: Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition, Bind 22, Nr. 3, 2015, s. 301-311.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Jørgensen, K, Kristensen, MK, Waldemar, G & Vogel, A 2015, 'The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease', Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition, bind 22, nr. 3, s. 301-311. https://doi.org/10.1080/13825585.2014.932325

APA

Jørgensen, K., Kristensen, M. K., Waldemar, G., & Vogel, A. (2015). The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease. Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition, 22(3), 301-311. https://doi.org/10.1080/13825585.2014.932325

Vancouver

Jørgensen K, Kristensen MK, Waldemar G, Vogel A. The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease. Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition. 2015;22(3):301-311. https://doi.org/10.1080/13825585.2014.932325

Author

Jørgensen, Kasper ; Kristensen, Maria K ; Waldemar, Gunhild ; Vogel, Asmus. / The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease. I: Neuropsychology, development, and cognition. Section B, Aging, neuropsychology and cognition. 2015 ; Bind 22, Nr. 3. s. 301-311.

Bibtex

@article{9787a9c7e61844b689eb8e2e7ab246d5,
title = "The six-item Clock Drawing Test – reliability and validity in mild Alzheimer{\textquoteright}s disease",
abstract = "This study presents a reliable, short and practical version of the Clock Drawing Test (CDT) for clinical use and examines its diagnostic accuracy in mild Alzheimer's disease versus elderly nonpatients. Clock drawings from 231 participants were scored independently by four clinical neuropsychologists blind to diagnostic classification. The interrater agreement of individual scoring criteria was analyzed and items with poor or moderate reliability were excluded. The classification accuracy of the resulting scoring system - the six-item CDT - was examined. We explored the effect of further reducing the number of scoring items on classification accuracy and estimated classification accuracy associated with performances deviating from the optimal cutoff score. At a cutoff of 5/6, the six-item CDT had a sensitivity (SN) of 0.65 and a specificity of 0.80. Stepwise removal of up to three items reduced SN slightly. Classification accuracy associated with a score of four or less out of six was very high.",
keywords = "Aged, Aged, 80 and over, Alzheimer Disease, Female, Geriatric Assessment, Humans, Male, Neuropsychological Tests, Psychiatric Status Rating Scales, ROC Curve, Reproducibility of Results, Severity of Illness Index",
author = "Kasper J{\o}rgensen and Kristensen, {Maria K} and Gunhild Waldemar and Asmus Vogel",
year = "2015",
doi = "10.1080/13825585.2014.932325",
language = "English",
volume = "22",
pages = "301--311",
journal = "Aging, Neuropsychology, and Cognition",
issn = "1382-5585",
publisher = "Taylor & Francis Online",
number = "3",

}

RIS

TY - JOUR

T1 - The six-item Clock Drawing Test – reliability and validity in mild Alzheimer’s disease

AU - Jørgensen, Kasper

AU - Kristensen, Maria K

AU - Waldemar, Gunhild

AU - Vogel, Asmus

PY - 2015

Y1 - 2015

N2 - This study presents a reliable, short and practical version of the Clock Drawing Test (CDT) for clinical use and examines its diagnostic accuracy in mild Alzheimer's disease versus elderly nonpatients. Clock drawings from 231 participants were scored independently by four clinical neuropsychologists blind to diagnostic classification. The interrater agreement of individual scoring criteria was analyzed and items with poor or moderate reliability were excluded. The classification accuracy of the resulting scoring system - the six-item CDT - was examined. We explored the effect of further reducing the number of scoring items on classification accuracy and estimated classification accuracy associated with performances deviating from the optimal cutoff score. At a cutoff of 5/6, the six-item CDT had a sensitivity (SN) of 0.65 and a specificity of 0.80. Stepwise removal of up to three items reduced SN slightly. Classification accuracy associated with a score of four or less out of six was very high.

AB - This study presents a reliable, short and practical version of the Clock Drawing Test (CDT) for clinical use and examines its diagnostic accuracy in mild Alzheimer's disease versus elderly nonpatients. Clock drawings from 231 participants were scored independently by four clinical neuropsychologists blind to diagnostic classification. The interrater agreement of individual scoring criteria was analyzed and items with poor or moderate reliability were excluded. The classification accuracy of the resulting scoring system - the six-item CDT - was examined. We explored the effect of further reducing the number of scoring items on classification accuracy and estimated classification accuracy associated with performances deviating from the optimal cutoff score. At a cutoff of 5/6, the six-item CDT had a sensitivity (SN) of 0.65 and a specificity of 0.80. Stepwise removal of up to three items reduced SN slightly. Classification accuracy associated with a score of four or less out of six was very high.

KW - Aged

KW - Aged, 80 and over

KW - Alzheimer Disease

KW - Female

KW - Geriatric Assessment

KW - Humans

KW - Male

KW - Neuropsychological Tests

KW - Psychiatric Status Rating Scales

KW - ROC Curve

KW - Reproducibility of Results

KW - Severity of Illness Index

U2 - 10.1080/13825585.2014.932325

DO - 10.1080/13825585.2014.932325

M3 - Journal article

C2 - 24974730

VL - 22

SP - 301

EP - 311

JO - Aging, Neuropsychology, and Cognition

JF - Aging, Neuropsychology, and Cognition

SN - 1382-5585

IS - 3

ER -

ID: 152246267