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The clinico-radiological paradox of cognitive function and MRI burden of white matter lesions in people with multiple sclerosis: a systematic review and meta-analysis.

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    Rights statement: © 2017 Mollison et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

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http://journals.plos.org/plosone/article?id=10.1371/journal.pone.0177727
Original languageEnglish
JournalPLoS ONE
Early online date15 May 2017
DOIs
StateE-pub ahead of print - 15 May 2017

Abstract

Background
Moderate correlation exists between the imaging quantification of brain white matter lesions and cognitive performance in people with multiple sclerosis (MS). This may reflect the greater importance of other features, including subvisible pathology, or methodological limitations of the primary literature.
Objectives
To summarise the cognitive clinico-radiological paradox and explore the potential methodological factors that could influence the assessment of this relationship.
Methods
Systematic review and meta-analysis of primary research relating cognitive function to white matter lesion burden.
Results
Fifty papers met eligibility criteria for review, and meta-analysis of overall results was possible in thirty-two (2050 participants). Aggregate correlation between cognition and T2 lesion burden was r = -0.30 (95% confidence interval: -0.34, -0.26). Wide methodological variability was seen, particularly related to key factors in the cognitive data capture and image analysis techniques.
Conclusions
Resolving the persistent clinico-radiological paradox will likely require simultaneous evaluation of multiple components of the complex pathology using optimum measurement techniques for both cognitive and MRI feature quantification. We recommend a consensus initiative to support common standards for image analysis in MS, enabling benchmarking while also supporting ongoing innovation.

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