Poor PASAT performance correlates with MRI contrast enhancement in multiple sclerosis

Neurology
J Bellmann-StroblF Paul

Abstract

Cognitive impairment is increasingly recognized as relevant clinical feature in multiple sclerosis (MS). We applied the Paced Auditory Serial Addition Test (PASAT), a recommended screening tool for cognitive dysfunction in MS, to investigate the relationship between cognitive performance and the presence of gadolinium (Gd)-enhancing lesions on brain MRI. In this longitudinal correlational research study, 75 patients with relapsing-remitting MS (48 women and 27 men, mean age 36 years, mean disease duration 5 years, mean Expanded Disability Status Scale [EDSS] 1.7) without clinical signs of a relapse underwent 2 MRI measurements (number and volume of T1 contrast-enhancing lesions and of T2 lesions) and clinical examinations (EDSS and Multiple Sclerosis Functional Composite [MSFC]) with a mean interscan interval of 10 weeks. Patients were divided into 3 groups: A (n = 38), Gd on 1 scan; B (n = 12), Gd on both scans; and C (n = 25), Gd on neither scan. In group A, PASAT was better at the Gd-negative time point (p = 0.002), whereas the other MSFC subscores remained unchanged. Subgroup analysis confirmed the finding in patients with a Gd-positive scan first, whereas this was not the case for patients with a Gd-negative scan first, pr...Continue Reading

Citations

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