| Publication | 
Definition | 
Sample size | 
Age in years (SD) | 
Males (%) | 
Right handed (%) | 
Years of education (SD) | 
 
| 
Audoin 2006...
 | 
Individuals with relapse-remitting multiple sclerosis | 
21 | 
38.00 | 
5 (24%) | 
N/A | 
N/A |  
| 
Audoin 2010...
 | 
Individuals with clinically isolated syndrome suggestive of multiple sclerosis | 
62 | 
29.00 (7.10) | 
15 (24%) | 
N/A | 
N/A |  
| 
Ceccarelli 2...
 | 
Individuals with benign multiple sclerosis | 
19 | 
41.50 (5.60) | 
4 (21%) | 
N/A | 
N/A |  
| 
Ceccarelli 2...
 | 
Individuals with relapse-remitting multiple sclerosis | 
15 | 
33.30 (7.80) | 
3 (20%) | 
N/A | 
N/A |  
| 
Ceccarelli 2...
 | 
Individuals with clinically isolated syndrome suggestive of multiple sclerosis | 
28 | 
30.70 (5.40) | 
13 (46%) | 
N/A | 
N/A |  
| 
Duan 2012...
 | 
Individuals with relapse-remitting multiple sclerosis | 
26 | 
36.50 (10.70) | 
2 (8%) | 
N/A | 
N/A |  
| 
Henry 2008...
 | 
Individuals with clinically isolated syndrome suggestive of multiple sclerosis | 
41 | 
37.00 (10.00) | 
12 (29%) | 
N/A | 
N/A |  
| 
Mesaros 2008...
 | 
Individuals with benign multiple sclerosis | 
60 | 
46.20 (7.10) | 
23 (38%) | 
N/A | 
N/A |  
| 
Mesaros 2008...
 | 
Individuals with relapse-remitting multiple sclerosis | 
28 | 
14.40 (2.50) | 
12 (43%) | 
N/A | 
N/A |  
| 
Morgen 2006...
 | 
Individuals with relapse-remitting multiple sclerosis | 
19 | 
32.40 (8.20) | 
N/A | 
N/A | 
N/A |  
| 
Prakash 2010...
 | 
Individuals with relapse-remitting multiple sclerosis | 
21 | 
44.20 (1.90) | 
0 (0%) | 
N/A | 
N/A |  
| 
Prinster 200...
 | 
Individuals with relapse-remitting multiple sclerosis | 
51 | 
38.60 (7.50) | 
15 (29%) | 
N/A | 
N/A |  
| 
Prinster 201...
 | 
Individuals with relapse-remitting multiple sclerosis | 
128 | 
36.07 (9.20) | 
42 (33%) | 
N/A | 
N/A |  
| 
Raz 2010...
 | 
Individuals with clinically isolated syndrome suggestive of multiple sclerosis | 
34 | 
31.70 (7.70) | 
13 (38%) | 
N/A | 
N/A |  
| 
Riccitelli 2...
 | 
Individuals with relapse-remitting multiple sclerosis and fatigue | 
10 | 
38.00 (7.70) | 
4 (40%) | 
N/A | 
N/A |  
| 
Riccitelli 2...
 | 
Individuals with relapse-remitting multiple sclerosis but no fatigue | 
14 | 
38.60 (8.50) | 
6 (43%) | 
N/A | 
N/A |  
| 
Riccitelli 2...
 | 
Individuals with relapse-remitting multiple sclerosis | 
78 | 
40.20 | 
23 (29%) | 
N/A | 
N/A |  
| 
Spano 2010...
 | 
Individuals with benign multiple sclerosis | 
10 | 
44.50 (6.50) | 
2 (20%) | 
N/A | 
N/A |