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Table 3 Endoscopic grading in both study groups

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
  1. Data are number (n) and percentage (%)
  2. χ2 chi-squared statistic
  3. *Chi-squared test for trend