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Table 1 Comparison of patient characteristics and pre- and perioperative factors between genders

From: The impact of gender difference on operative time in laparoscopic partial nephrectomy for T1 renal tumor and the utility of retroperitoneal fat thickness as a predictor of operative time

A. Retrospective approach (N = 111) Female (N = 28) Male (N = 83) P value
Age (years)    55.5 ± 12.5 58.9 ± 12.8 0.226
Side (no.) Right/Left   15/13 33/50 0.202
Height (cm)    156.2 ± 6.9 168.6 ± 7.2 <0.001a
Body weight (kg)    53.4 ± 9.4 69.8 ± 13.9 <0.001a
Body mass index (cm/kg2)    22.0 ± 3.7 24.4 ± 3.8 0.005a
Max. tumor diameter (mm)    23.3 ± 6.7 24.1 ± 7.3 0.605
The R.E.N.A.L. Nephrometry Score    5.7 ± 1.5 5.8 ± 1.4 0.954
Ischemia time    14.6 ± 9.0 19.2 ± 11.9 0.069
Resected volume (g)    7.3 ± 2.9 14.9 ± 14.7 0.018a
Histological findings histologic subtypes clear cell 12 62 <0.001a
   papillary 0 8  
   chromophobe 5 1  
   oncocytoma 0 5  
   angiomyolipoma 6 2  
   other 5 5  
Blood loss (ml)    16.9 ± 23.8 109.5 ± 247.8 0.056
Surgical complications Peritoneal injury   3 4 0.395
B. Transperitoneal approach (N = 64) Female (N = 20) Male (N = 44) P value
Age (years)    56.6 ± 16.8 62.3 ± 11.8 0.122
Side (no.) Right/left   12/8 30/14 0.523
Height (cm)    155.2 ± 6.7 168.0 ± 6.0 <0.001a
Body weight (kg)    55.1 ± 9.1 70.2 ± 10.7 <0.001a
Body mass index (cm/kg2)    22.9 ± 4.0 24.9 ± 3.6 0.057
Max. tumor diameter (mm)    22.4 ± 8.6 25.8 ± 8.2 0.149
The R.E.N.A.L. Nephrometry Score    6.0 ± 1.5 6.6 ± 1.4 0.106
Ischemia time    18.7 ± 9.6 18.4 ± 8.8 0.924
Resected volume (g)    9.7 ± 6.3 15.8 ± 11.2 0.019
Histological findings histologic subtypes clear cell 12 32 0.413
   papillary 1 4  
   chromophobe 1 2  
   oncocytoma 1 1  
   angiomyolipoma 3 1  
   other 2 4  
Blood loss (ml)    86.5 ± 94.4 60.6 ± 89.0 0.306
Surgical complications Ileum injury   0 1 NA
  1. aSignificant differences between the two groups as determined by unpaired t-test, Mann-Whitney’s U test or chi-square test