Table 3

Discriminant validity analysis of the MSSID

Clinical groupnMobilityFatigueOverall impact
MedianMean rankMedianMean rankMedianMean rank
M-W, Mann-Whitney U test.
Results with statistical significance are in bold.
Relapsing remitting29 4.4 40 4.436 3.5 38
Progressive34 3.6 26 4.329 3.3 27
M-W 278 (p = 0.003) 382 (p = 0.123) 315 (p = 0.012)
Walked unaided31 4.36 39 4.6 38 3.5 38
Used walking aid32 3.5 24 4.1 36 3.25 25
M-W 245 (p = 0.001) 291 (p = 0.007) 277 (p = 0.004)
Relapse in previous 3 months213.625 4 23 3.25 24
No relapse in previous 3 months384.233 4.6 34 3.5 34
M-W295 (p = 0.098) 245 (p = 0.02) 264 (p = 0.03)