From: Impact of mucosal biofilm and bony osteitis on chronic rhinosinusitis with nasal polyps
 |  | Group |  |  | |||
---|---|---|---|---|---|---|---|
CRSwNP (n = 45) | Control (n = 10) | ||||||
Endoscopic grading |  | n | % | n | % | χ2(1) | P value* |
 Right side | Grade 0 | 0 | 0.0 | 10 | 100.0 | 36.258 | < 0.001 |
Grade I | 5 | 11.1 | 0 | 0.0 | |||
Grade II | 14 | 31.1 | 0 | 0.0 | |||
Grade III | 24 | 53.3 | 0 | 0.0 | |||
Grade IV | 2 | 4.4 | 0 | 0.0 | |||
 Left side | Grade 0 | 1 | 2.2 | 10 | 100.0 | 32.083 | < 0.001 |
Grade I | 5 | 11.1 | 0 | 0.0 | |||
Grade II | 13 | 28.9 | 0 | 0.0 | |||
Grade III | 22 | 48.9 | 0 | 0.0 | |||
Grade IV | 4 | 8.9 | 0 | 0.0 |