| Ultrasonography results | N | % |
| Inactivity | 5 | 9.4 (4.1 - 20.3) |
| Mild activity | 15 | 28.3 (18.0 - 41.6) |
| Moderate activity | 19 | 35.9 (18.0 - 41.6) |
| Severe activity | 14 | 26.4 (16.4 - 39.6) |
| Total | 53 | 100.0 |