| Evolution of the observed lesion | Total | |||
| Control delay | Regression | Stability | Frequency | Percentage (%) |
| Three days | 0 | 5 | 5 | 33.3 |
| Four days | 0 | 4 | 4 | 26.6 |
| Seven days | 1 | 5 | 6 | 40 |
| Total | 1 | 14 | 15 | 100 |