| Measure | PLA-EG (n = 14) | PLA-NEG (n = 18) | p-value | |
| Cognitive variables | ||||
| WCST | Categories Completed | 5.4 (1.6) | 4.2 (2.6) | 0.134 |
| Total Errors | 54.8 (20.7) | 30.2 (23.3) | 0.519 | |
| Perseverative Errors | 11.1 (6.7) | 10.8 (6.8) | 0.897 | |
| Non-perseverative Errors | 13.7 (14.5) | 19.4 (17.2) | 0.347 | |
| TMT | Part A time (s) | 58.4 (26.7) | 83.7 (61.8) | 0.163 |
| Part B time (s) | 109.9 (41.8) | 189.7 (122.4) | 0.017* | |
| Part B-Part A time (s) | 51.6 (20.0) | 106.1 (76.1) | 0.009** | |
| DST | Forward | 7.3 (2.0) | 7.5 (2.4) | 0.818 |
| Backward | 5.0 (1.2) | 5.1 (1.6) | 0.910 | |
| VFT | Letter [Ka] | 9.7 (3.3) | 8.9 (3.2) | 0.483 |
| Category [animal] | 17.3 (6.6) | 15.4 (6.5) | 0.435 | |
| JVLT | Immediate Recall Total | 31.6 (8.2) | 29.0 (7.1) | 0.350 |
| Delayed Recall | 12.1 (3.4) | 12.1 (2.3) | 0.969 | |
| Emotional variables | ||||
| HAMD-17a) | 2.1 (2.4) | 2.7 (2.0) | 0.463 | |
| Apathy Scale | 9.6 (5.4) | 10.9 (6.1) | 0.510 |