| Evolution | <1 months | 3 months | 6 months | 12 months | >12 months | |
| Nasal obstruction | 0 case | 4 cases | 1 case | 7 cases | 10 cases | |
| Smell problems | Dysosmia | 0 case | 4 cases | 1 case | 4 cases | 3 cases |
| Unchanged | 3 cases | 3 cases | 3 cases | 3 cases | 2 cases | |
| Rhinorrhea | 0 case | 2 cases | 5 cases | 6 cases | 9 cases | |
| Relapse | 0 case | 0 case | 3 cases | 4 cases | 6 cases | |
| Lost view | 7 cases | 13 cases | 18 cases | 22 cases | 22 cases | |