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Table 3 Impact of lymph node ratio according to different pN stages

From: Using the lymph nodal ratio to predict the risk of locoregional recurrence in lymph node-positive breast cancer patients treated with mastectomy without radiation therapy

Characteristic   LRFS OS
  n 5-year (%) 10-year (%) p 5-year (%) 10-year (%) p
pN1 (1–3 positive nodes)        
Lymph node ratio        
 < 0.20 667 90.3 88.2 0.002* 87.3 79.0 0.054
 0.21-0.65 107 80.0 74.8   80.1 71.0  
 > 0.65 6 83.3   75.0  
pN2 (4–9 positive nodes)        
Lymph node ratio        
 < 0.20 16 80.0 <0.001* 84.4 56.3 0.004*
 0.21-0.65 141 82.1 77.2   72.0 55.2  
 > 0.65 26 44.6   49.2 26.2  
pN3 (≥ 10 positive nodes)        
Lymph node ratio        
 < 0.20 7 66.7 0.508 80.0 0.013*
 0.21-0.65 21 59.2   69.3  
 > 0.65 77 62.2 49.8   41.4 15.4  
  1. LRFS, Locoregional recurrence-free survival; OS, Overall survival.
  2. *p<0.05 indicates a significant difference.