3 years ago

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

Denis Mollison, Robin Sellar, Siddharthan Chandran, Daisy Mollison, Mark Bastin, Peter Connick, Joanna Wardlaw

by Daisy Mollison, Robin Sellar, Mark Bastin, Denis Mollison, Siddharthan Chandran, Joanna Wardlaw, Peter Connick

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.

Publisher URL: http://journals.plos.org/plosone/article

DOI: 10.1371/journal.pone.0177727

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