0: | No abnormal sensations. |
1: | Abnormal sensations that do not cause noticeable discomfort, such as dizziness, unusual perspiration, and mild stomach awareness. |
2: | Mild discomfort, which is noticeable, but is not distracting and would not interfere, even with the performance of demanding tasks. |
3: | Moderate discomfort, which can be tolerated indefinitely, but is distracting and might affect one's ability to perform demanding tasks. |
4: | Severe discomfort, which cannot be tolerated indefinitely, or the feeling of impending vomiting. |