Descriptive statistics and scores of neuropsychological and clinical testing for MS patients; means and standard deviations (in brackets).

Legend: N = sample size; EDSS = expanded disability status scale; SRT = selective reminding test; SPAT = spatial recall test; PASAT = paced auditory serial addition test; SDMT = symbol digit modalities test; WLG = word list generation; CIS = clinically isolated syndrome; RRMS = relapsing remitting MS; SPMS = secondary progressive MS; f = female; m = male.