Control(30) MS(15) (Short) MS(15) (Long) Z P
Age 39±11 36±8 39±9    
Dur of Disease (Months)   16±10 124±48    
EDSS   1.2±1 2.6±2    
MMSE   27±2 26±3    
Frontal Latency(ms)          
N100 105±18 106±8 109±13 0.254 0.77
P200 173±18 182±29 183±22 1.364 0.26
N200 225±23 244±45 250±30 3.460 0.038***
P300 342±42 335±43 376±42 4.653 0.014***
Central Latency(ms)          
N100 105±18 107±9 111±18 0.744 0.48
P200 173±18 184±27 181±19 1.343 0.27
N200 225±23 236±45 250±33 2.688 0.07
P300 345±37 332±43 378±38 5.041 0.010***
Parietal Latency(ms)          
N100 106±18 108±14 115±16 1.21 0.30
P200 173±18 183±29 186±24 1.748 0.18
N200 226±23 243±35 253±31 4.432 0.016***
P300 342±32 337±42 390±39 9.121 0.000***
***PostHoc analysis of ANOVA comparisons revealed that the significant differences (increases) in ERP’ latencies was present in between controls and in patients with longer disease duration
Table 2: ERPs of MS patients with a disease duration of less (short) and more than (long) 5 years.