Role of cognitive testing in disease modifying AD trials

P. J. Visser*

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingChapterAcademicpeer-review


Cognitive impairment is a key feature of Alzheimer's disease (AD). Cognitive performance will therefore be an important outcome measure in disease modifying drug trials. However, cognitive assessment also has several limitations such as a large inter and intra individual variability and floor and ceiling effects. To reduce the effect of these limitations on the accuracy with which drug-related changes can be detected, it is proposed to analyse cognitive change using a slope analysis. In addition, it is suggested to use as the main outcome measure for cognitive impairment a neuropsychological compound score that is based on a z-score transformation of a number of well-validated tests. The selection of these tests would depend on a number of study characteristics such as the inclusion criteria and the length of follow-up.

Original languageEnglish
Title of host publicationResearch and Practice in Alzheimer's Disease
EditorsB. Vellas, E. Giacobini
Number of pages5
Publication statusPublished - 1 Dec 2006

Publication series

NameResearch and Practice in Alzheimer's Disease
ISSN (Print)1284-8360

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