Table 1 Clinical characteristics of the participants

Gender (M/F)

6/2

22/12

9/6

8/0

Age (years)

54.50 ± 13.24

57.79 ± 10.32

59.40 ± 11.87

63.00 ± 8.32

Long diameter(mm)

40.63 ± 18.56

48.91 ± 21.93

51.53 ± 24.77

76.13 ± 27.37

Calcification (number)

3

20

3

4

Necrotic or cystic (number)

6

34

14

8

Nephrectomy (number)

Partial nephrectomy (%)

6 (9.6%)

19 (29.1%)

8 (12.2%)

0 (0.0%)

Radical nephrectomy (%)

2 (3.1%)

15 (23.1%)

7 (10.7%)

8 (12.2%)

Location (number)

 Left (%)

2 (3.1%)

17 (26.1%)

3 (4.2%)

2 (3.1%)

 Right (%)

6 (9.6%)

17 (26.1%)

12 (18.2%)

6 (9.6%)

T stage (number)

 T1a

4

13

4

1

 T1b

4

16

6

1

 T2a

0

2

3

2

 T2b

0

2

0

0

 T3a

0

0

1

2

 T3b

0

1

0

2

 T4

0

0

1

0

N stage (number)

 N1

1

4

3

2

M stage (number)

 M1

0

1

2

3

 Hct

46.39 ± 3.44

43.12 ± 3.94

42.94 ± 3.94

38.73 ± 7.39