Table 2.
Comparison of Olfactory Bulb Volumes, Olfactory Sulcus Depths, Olfactory Bulb Morphology/Signal Intensity and Olfactory Filiae Architecture in COVID-19 Related and Post-Infectious Olfactory Dysfunction
| COVID-19 (n = 31) | Post- Infectious (n = 97) | p | |
|---|---|---|---|
| R olfactory bulb volume (mm3) | 60.3±12.7 | 48.6±15.4 | 0.001 |
| L olfactory bulb volume (mm3) | 59.5±16.4 | 48.9±15.6 | 0.002 |
| R olfactory sulcus depth (mm) | 6.80±2.0 | 6.50±2.1 | 0.469 |
| L olfactory sulcus depth (mm) | 6.30±2.1 | 6.20±2.0 | 0.886 |
| Olfactory bulb morphology | 0.558 | ||
| Normal | 13 (41.9) | 35 (36.1) | |
| Deformed | 18 (58.1) | 62 (63.9) | |
| Olfactory bulb signal abnormality | |||
| Central | 8 (25.8) | 23 (23.7) | 0.813 |
| Rostral | 11 (35.5) | 32 (33) | 0.798 |
| Caudal | 0 (0) | 3 (3.1) | 1.000 |
| Olfactory filia clumping | 0.001 | ||
| Absent | 9 (29.0) | 68 (70.1) | |
| Mild | 20 (64.5) | 29 (29.9) | |
| Marked | 2 (6.5) | 0 |