Table 4 Correlation between basal, follow‐up and longitudinal delta values (difference between final and basal) of evoked potential scores and their related functional system (visual, somatosensory, pyramidal) and of evoked potential scores and Expanded Disability Status Scale in the whole cohort of patients with multiple sclerosis who underwent both basal and follow‐up evaluations.
| n = 64 | EDSS basal | EDSS final | Delta (final−basal) | FS basal | FS final | Delta (final−basal) |
|---|---|---|---|---|---|---|
| SEP | R = 0.55 (<0.001) | R = 0.41 (0.001) | R = 0.15 (NS) | R = 0.46 (<0.001) | R = 0.50 (<0.001) | R = 0.34 (0.006) |
| MEP | R = 0.50 (0.001) | R = 0.61 (<0.001) | R = 0.13 (NS) | R = 0.55 (<0.001) | R = 0.60 (<0.001) | R = 0.05 (NS) |
| VEP | R = 0.46 (<0.001) | R = 0.34 (0.006) | R = −0.10 (NS) | R = 0.47 (<0.001) | R = 0.18 (NS) | R = 0.01 (NS) |
| BAEP | R = 0.10 (NS) | R = 0.06 (NS) | R = 0.09 (NS) | R = 0.32 (0.01) | R = 0.33 (0.007) | R = 0.12 (NS) |
| Global EP | R = 0.60 (<0.001) | R = 0.46 (<0.001) | R = 0.18 (NS) |
BAEP, brain stem auditory evoked potential; EDSS, Expanded Disability Status Scale; EP, evoked potential; FS, functional system; LL, lower limb; MEP, motor evoked potential; NS, not significant; SEP, somatosensory evoked potential; UL, upper limb; VEP, visual evoked potential.
R and p values refer to Spearman's correlation coefficient.