Symptoms on which the mean score for Gulf veterans (n=8014) was at least twice that for the non-Gulf cohort (n=3900)
| Question number | Symptom | Ratio Gulf/non-Gulf |
| 68 | People telling you that you have a poor memory | 2.23 |
| 43 | A poor memory | 2.21 |
| 22 | Difficulty concentrating | 2.16 |
| 20 | Feeling irritated for no particular reason | 2.14 |
| 87 | Sudden changes of mood | 2.12 |
| 74 | Difficulty grasping the meaning of what you read | 2.12 |
| 58 | Clumsiness | 2.09 |
| 91 | Tingling under your skin | 2.07 |
| 41 | Feeling too weak to complete what you are doing | 2.07 |
| 56 | Feelings of anger that are difficult to control | 2.05 |
| 61 | Slurring your words | 2.04 |
| 83 | Feeling incapable of making decisions about things | 2.02 |
| 86 | Difficulty in saying what you want to say | 2.01 |
| 19 | Nervous trouble | 2.01 |