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Table 3 Survival rates at 5-year

From: Comparing the 7th and 8th editions of UICC/AJCC staging system for nasopharyngeal carcinoma in the IMRT era

7th edition 8th edition
T category OS DFS LRRFS T category OS DFS LRRFS
T1 95.1% 91.5% 98.8% T1 95.0% 91.3% 98.7%
T2 93.5% 90.1% 95.1% T2 93.7% 88.8% 95.2%
T3 84.6% 76.6% 89.6% T3 81.4% 72.6% 91.4%
T4 69.5% 58.2% 83.3% T4 56.5% 50.0% 78.5%
N category OS DFS DMFS N category OS DFS DMFS
N0 97.0% 97.0% 98.0% N0 97.0% 97.0% 98.0%
N1 84.4% 75.3% 92.3% N1 87.8% 75.3% 92.3%
N2 84.4% 75.8% 88.4% N2 84.8% 77.1% 89.0%
N3a 75.0% 75.0% 75.0% N3 72.3% 61.5% 78.5%
N3b 71.1% 50.5% 74.8%     
Clinical stage OS DFS   Clinical stage OS DFS  
I 100.0% 100.0%   I 100.0% 100.0%  
II 98.0% 98.0%   II 98.0% 98.0%  
III 91.3% 88.7%   III 88.0% 78.9%  
IVA 74.6% 70.2%   IVA 73.4% 61.5%  
IVB 74.6% 72.2%      
  1. Abbreviations: OS Overall survival. DFS Disease-free survival. LRRFS Locoregional recurrence-free survival. DMFS Distant metastasis-free survival
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