- Classification of the olfactory dysfunction (n=84).
| Olfactory dysfunction category | Number of studies | n (%) out of 33,231patients |
|---|---|---|
| Anosmia | 29 | 6929 (20.8) |
| Hyposmia | 4 | 1676 (5.0) |
| Anosmia or hyposmia | 17 | 2953 (8.9) |
| Parosmia | 9 | 613 (1.8) |
| Phantosmia | 4 | 262 (0.8) |
| Hyperosmia | 2 | 7 (0.02) |
Values are presented as numbers and precentages (%).