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Table 2 Univariate analysis of prognostic factors

From: Post-radiation sinusitis is associated with recurrence in nasopharyngeal carcinoma patients treated with intensity-modulated radiation therapy

  3 yr. OS (%) p 3 yr. DFS (%) p 3 yr. FFLF (%) p 3 yr. FFDF (%) p
Gender   0.025   0.009   0.06   0.018
 Male 89   76.3   89   84.9  
 Female 100   94.4   96.3   96.8  
Age   0.049   0.049   0.108   0.18
  < 40y/o 88.9   89.9   96.3   93.7  
  > 40y/o 88.4   76.7   88.5   85.2  
T classification   0.002   < 0.001   < 0.001   0.012
 T1–3 94   84   93.8   89.4  
 T4 72.2   54.1   66.5   73.7  
N classification   0.001   < 0.001   0.654   < 0.001
 N0–2 93.1   82.8   89.8   90.2  
 N3 71.6   51.7   88.9   57.4  
Chemotherapy   0.083   0.036   0.543   0.085
 No 100   88.9   88.9   94.4  
 Yes 90   78.5   90.7   86.1  
Pre-radiation sinusitis   0.048   0.002   0.057   0.082
 No 96.4   89.4   93.7   91.4  
 Yes 87.1   72.5   87.9   84.2  
Post-radiation sinusitis   0.008   < 0.001   < 0.001   0.003
 No 97.4   92.1   97.9   94.1  
 Yes 84.4   66.5   81.7   79.8  
  1. Abbreviations: p p-value, OS overall survival rate, DFS disease-free survival rate, FFLF freedom from local failure, FFDF freedom from distant failure