| for at least six months | 12 | temporal |
| in the early stages | 10 | temporal |
| sometimes | 9 | temporal |
| patient → have → symptom | 303 |
| patient → develop → symptom | 71 |
| patient → had → symptom | 15 |
| patient → get → symptom | 3 |
| patient → be had → symptom | 3 |
| negative | neutral | positive |
| 0.454 | 0.481 | 0.066 |
| Raw frequency | 395 |
| Normalized frequency | 0.857 |
| Modifier score | 0.665 |
| Perplexity | 163.538 |