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Nasal endoscopy grade and paranasal sinus status on MRI
| Grade | Maxillary sinus | Ethmoid sinus | Sphenoid sinus | Frontal sinus |
|---|---|---|---|---|
| Grade 0 | 2 (18%) | 2 (18%) | 1 (9%) | 0 (0%) |
| Grade I | 158 (57.4%) | 104 (37.8%) | 58 (21%) | 15 (5%) |
| Grade II | 136 (76%) | 117 (65.3%) | 78 (43.5%) | 27 (15%) |
| Grade III | 113 (98.2%) | 111 (96.5%) | 86 (74.8%) | 43 (37.4%) |
| Grade IV | 70 (100%) | 67 (95.7%) | 59 (84.3%) | 43 (61.4%) |
| Total | 479 (73.7%) | 401(61.7%) | 282(43.4%) | 128(19.7%) |
