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Table 1 Summary of clinical and pathological features (study population n = 520)

From: Enhancer of zeste homolog 2 (EZH2) expression is an independent prognostic factor in renal cell carcinoma

Feature   Number of cases % of cases
Sex    
  Male 320 61.5
  Female 200 38.5
Age at surgery   
  < 65 years 295 56.7
  ≥ 65 years 225 43.3
Karnofsky perfomance status scale   
  ≥ 80% 476 91.5
  < 80% 44 8.5
Tumor extent (Robson)   
  Stage I 310 59.6
  Stage II 37 7.1
  Stage III 83 16.0
  Stage IV 90 17.3
Regional lymph node metastasis   
  N0/pN0 481 92.5
  pN+ 39 7.5
Distant metastasis   
  M0 433 83.3
  M+ 87 16.7
Fuhrman grade   
  G1/G2 417 80.2
  G3/G4 98 18.8
  Unclassified 5 1.0
Histopathological subtype   
  Clear cell RCC 422 81.1
  Papillary (chromophilic) RCC 55 10.6
  Chromophobe RCC 23 4.4
  Duct bellini 3 0.6
  Unclassified RCC 17 3.3