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

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

<0.001^a

Body weight (kg)

53.4 ± 9.4

69.8 ± 13.9

<0.001^a

Body mass index (cm/kg2)

22.0 ± 3.7

24.4 ± 3.8

0.005^a

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

0.018^a

Histological findings

histologic subtypes

clear cell

12

62

<0.001^a

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

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

<0.001^a

Body weight (kg)

55.1 ± 9.1

70.2 ± 10.7

<0.001^a

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