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Diagnostics 2015, 5(4), 504-512;

Performance-Based Cognitive Screening Instruments: An Extended Analysis of the Time versus Accuracy Trade-off

Cognitive Function Clinic, Walton Centre for Neurology and Neurosurgery, Lower Lane, Fazakerley, Liverpool L9 7LJ, UK
Academic Editor: Eef Hogervorst
Received: 29 September 2015 / Revised: 19 November 2015 / Accepted: 19 November 2015 / Published: 27 November 2015
(This article belongs to the Special Issue Early Dementia Screening and Treatment)
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Early and accurate diagnosis of dementia is key to appropriate treatment and management. Clinical assessment, including the use of cognitive screening instruments, remains integral to the diagnostic process. Many cognitive screening instruments have been described, varying in length and hence administration time, but it is not known whether longer tests offer greater diagnostic accuracy than shorter tests. Data from several pragmatic diagnostic test accuracy studies examining various cognitive screening instruments in a secondary care setting were analysed to correlate measures of test diagnostic accuracy and test duration, building on the findings of a preliminary study. High correlations which were statistically significant were found between one measure of diagnostic accuracy, area under the receiver operating characteristic curve, and surrogate measures of test duration, namely total test score and total number of test items/questions. Longer cognitive screening instruments may offer greater accuracy for the diagnosis of dementia, an observation which has possible implications for the optimal organisation of dedicated cognitive disorders clinics. View Full-Text
Keywords: diagnosis; cognitive screening instruments; dementia; accuracy diagnosis; cognitive screening instruments; dementia; accuracy

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Larner, A.J. Performance-Based Cognitive Screening Instruments: An Extended Analysis of the Time versus Accuracy Trade-off. Diagnostics 2015, 5, 504-512.

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