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Table 4 Univariate analysis of baseline characteristics, tumor characteristics, and function protection types in each level of renal function

From: Predictors of postoperative renal functional damage after nephron-sparing surgery

  Little damage (n= 36) Heavy damage (n= 15) P
Baseline characteristics
 Sex (n)    0.733*
  Male 28 11  
  Female 8 4  
 Age (mean ± SD) 50.4 ± 6.9 56.4 ± 8.0 0.042 **
 Tumor location (n)    0.088*
  Left 17 11  
  Right 19 4  
 Pathology (n)    0.860*
  Malignant 28 12  
  Benign 8 3  
 GFR of tumor-involved kidney (ml/min 1.73 m2) 48.1 ± 8.8 41.5 ± 9.7 0.039 **
Tumor characteristics
 Maximum diameter (n)    0.047*
  Φ ≤ 1 cm 7 1  
  1 cm < Φ ≤ 4 cm 22 6  
  Φ > 4 cm 7 8  
 Depth (n)    0.001*
  Exophytic 10 2  
  Central 22 4  
  Intraparenchymal 4 9  
Function protection types
 Vessel blockage type (n)    0.794*
  Continuous artery blocking 23 9  
  Continuous artery and vein blocking 13 6  
 Ischemic protection type (n)    0.017*
  Local cooling 25 5  
  Mannitol application 11 10  
 Warm ischemic time    0.187*
  ≤25 minutes 30 10  
  >25 minutes 6 5  
  1. *Chi-square test, ** ANOVA. Italic p values indicate statistical significance.