Abstract
Background
Although there is evidence that shows worse cognitive functioning in male patients with multiple sclerosis (MS), the role of brain pathology in this context is under-investigated.
Objective
To investigate sex differences in cognitive performance of MS patients, in the context of brain pathology and disease burden.
Methods
Brain MRI, neurological examination, neuropsychological assessment (Brief International Cognitive Assessment in MS—BICAMS, and Paced Auditory Verbal Learning Test—PASAT), and patient-reported outcome questionnaires were performed/administered in 1052 MS patients.
Results
Females had higher raw scores in the Symbol Digit Modalities Test (SDMT) (57.0 vs. 54.0; p < 0.001) and Categorical Verbal Learning Test (CVLT) (63.0 vs. 57.0; p < 0.001), but paradoxically, females evaluated their cognitive performance by MS Neuropsychological Questionnaire as being worse (16.6 vs 14.5, p = 0.004). Females had a trend for a weaker negative correlation between T2 lesion volume and SDMT (\(\rho\) = – 0.37 in females vs. – 0.46 in men; interaction p = 0.038). On the other hand, women had a trend for a stronger correlation between Brain Parenchymal Fraction (BPF) and a visual memory test (Spearman’s \(\rho\) = 0.31 vs. 0.21; interaction p = 0.016). All these trends were not significant after correction for false discovery rate.
Conclusions
Although, females consider their cognition as worse, males had at a group level slightly worse verbal memory and information processing speed. However, the sex differences in cognitive performance were smaller than the variability of scores within the same sex group. Brain MRI measures did not explain the sex differences in cognitive performance among MS patients.
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Funding
This work was supported by the institutional support of the hospital research [RVO VFN 64165], Czech Ministry of Education [project Cooperation LF1, research area Neuroscience], The project National Institute for Neurological Research—funded by the European Union—Next Generation EU [Programme EXCELES, ID project No LX22NPO5107], Czech Ministry of Health project [grant number NU22-04-00193], the Charles University Grant Agency (GAUK) [grant number 1154218].
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J.M. received compensation for travel, conference fees, and speaker honoraria from Sanofi Genzyme, Biogen, Novartis, and Merck. L.F. received compensation for travel, conference fees, and speaker honoraria from Biogen and Roche. RG, TF and JBD have nothing to declare. MV received speaker honoraria and consultant fees from Biogen Idec, Novartis, Merck Serono, and Teva, as well as support for research activities from Biogen Idec. JK received financial support for research activities from Biogen Idec. EKH received speaker honoraria and consultant fees from Biogen Idec, Merck Serono, Novartis, Genzyme, Teva, Actelion, and Receptos, as well as support for research activities from Biogen Idec and Merck Serono. DH received compensation for travel, speaker honoraria and consultant fees from Biogen Idec, Novartis, Merck Serono, Bayer Shering, and Teva, as well as support for research activities from Biogen Idec. TU received financial support for conference travel and honoraria from Biogen Idec, Novartis, Roche, Genzyme, and Merck Serono, as well as support for research activities from Biogen Idec and Sanofi.
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Motyl, J., Friedova, L., Ganapathy Subramanian, R. et al. Brain MRI disease burden and sex differences in cognitive performance of patients with multiple sclerosis. Acta Neurol Belg 124, 109–118 (2024). https://doi.org/10.1007/s13760-023-02350-7
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DOI: https://doi.org/10.1007/s13760-023-02350-7