Number of subjects |
14 |
11 |
16 |
12 |
|
Mean years of age (SD) |
61 ( 7) |
51 ( 6) |
63 ( 7) |
57 ( 7) |
<0.01 |
Mean years of education (SD) |
13 ( 2) |
14 (1) |
12 ( 3) |
12 ( 1) |
0.15 |
Chronic fatigue syndrome, CDC definition (%) |
0 ( 0) |
1 ( 9) |
1 ( 6) |
1 ( 8) |
0.78 |
Fibromyalgia, survey definition (%) |
1 ( 7) |
2 (18) |
6 (38) |
10 (83) |
<0.001 |
Major depressive disorder, active (%) |
0 ( 0) |
2 (18) |
3 (19) |
0 ( 0) |
0.12 |
Alcohol abuse or dependence, active (%) |
4 (29) |
4 (36) |
6 (38) |
5 (42) |
0.94 |
Drug abuse or dependence, active (%) |
2 (14) |
1 (9) |
0 ( 0) |
2 (17) |
0.35 |
Posttraumatic stress disorder, active (%) |
0 ( 0) |
2 (18) |
4 (25) |
3 (25) |
0.20 |