Descriptive variables for controls and patients.

<p>NGMV, normalized gray matter volume; NWMV, normalized white matter volume; NBV, normalized brain volume; EDSS, expanded disability status scale.^a NWMV was not used for further analyses: lesion filling was not performed and therefore NWMV was not reliably estimated. ^b indicates median and range.* indicates significant differences between the two groups.