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The Clock Drawing Test: Performance differences between the free-drawn and incomplete-copy versions in patients with MCI and dementia

Overview of attention for article published in Dementia & Neuropsychologia, January 2016
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Title
The Clock Drawing Test: Performance differences between the free-drawn and incomplete-copy versions in patients with MCI and dementia
Published in
Dementia & Neuropsychologia, January 2016
DOI 10.1590/s1980-5764-2016dn1003009
Pubmed ID
Authors

Bárbara Costa Beber, Renata Kochhann, Bruna Matias, Márcia Lorena Fagundes Chaves

Abstract

The Clock Drawing Test (CDT) is a brief cognitive screening tool for dementia. Several different presentation formats and scoring methods for the CDT are available in the literature. In this study we aimed to compare performance on the free-drawn and "incomplete-copy" versions of the CDT using the same short scoring method in Mild Cognitive Impairment (MCI) and dementia patients, and healthy elderly participants. 90 participants (controlled for age, sex and education) subdivided into control group (n=20), MCI group (n=30) and dementia group (n=40) (Alzheimer's disease - AD=20; Vascular Dementia - VD=20) were recruited for this study. The participants performed the two CDT versions at different times and a blinded neuropsychologist scored the CDTs using the same scoring system. The scores on the free-drawn version were significantly lower than the incomplete-copy version for all groups. The dementia group had significantly lower scores on the incomplete-copy version of the CDT than the control group. MCI patients did not differ significantly from the dementia or control groups. Performance on the free-drawn copy differed significantly among all groups. The free-drawn CDT version is more cognitively demanding and sensitive for detecting mild/early cognitive impairment. Further evaluation of the diagnostic value (accuracy) of the free-drawn CDT in Brazilian MCI patients is needed.

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Mendeley readers

Mendeley readers

The data shown below were compiled from readership statistics for 14 Mendeley readers of this research output. Click here to see the associated Mendeley record.

Geographical breakdown

Country Count As %
Unknown 14 100%

Demographic breakdown

Readers by professional status Count As %
Student > Master 4 29%
Student > Bachelor 2 14%
Unspecified 1 7%
Student > Postgraduate 1 7%
Researcher 1 7%
Other 0 0%
Unknown 5 36%
Readers by discipline Count As %
Medicine and Dentistry 2 14%
Engineering 2 14%
Chemical Engineering 1 7%
Psychology 1 7%
Unspecified 1 7%
Other 2 14%
Unknown 5 36%
Attention Score in Context

Attention Score in Context

This research output has an Altmetric Attention Score of 1. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 27 October 2016.
All research outputs
#17,285,668
of 25,374,647 outputs
Outputs from Dementia & Neuropsychologia
#239
of 328 outputs
Outputs of similar age
#242,384
of 399,674 outputs
Outputs of similar age from Dementia & Neuropsychologia
#13
of 19 outputs
Altmetric has tracked 25,374,647 research outputs across all sources so far. This one is in the 21st percentile – i.e., 21% of other outputs scored the same or lower than it.
So far Altmetric has tracked 328 research outputs from this source. They typically receive more attention than average, with a mean Attention Score of 8.8. This one is in the 16th percentile – i.e., 16% of its peers scored the same or lower than it.
Older research outputs will score higher simply because they've had more time to accumulate mentions. To account for age we can compare this Altmetric Attention Score to the 399,674 tracked outputs that were published within six weeks on either side of this one in any source. This one is in the 30th percentile – i.e., 30% of its contemporaries scored the same or lower than it.
We're also able to compare this research output to 19 others from the same source and published within six weeks on either side of this one. This one is in the 15th percentile – i.e., 15% of its contemporaries scored the same or lower than it.