Table 1 Comparison of patient and tumor characteristics among differentiation grade groups

Male/female (n)

6/18

20/8

8/3

0.001

Age (years)

67 ± 7

67 ± 7

68 ± 12

0.912

Body weight (kg)

58.0 ± 13.8

57.3 ± 9.3

60.8 ± 9.3

0.677

Clinical size (mm)

22.4 ± 8.1

24.1 ± 8.2

23.3 ± 7.8

0.758

Pathological size (mm)

17.7 ± 6.9

21.2 ± 5.5

22.0 ± 6.7

0.069

Part-solid/Solid (n)

15/9

4/24

1/10

<0.001

3D-IRA (HU)

56.1 ± 22.6

48.5 ± 23.9

28.4 ± 15.8

0.005

Corrected 3D-IRA

9.05 ± 2.97

8.01 ± 4.09

4.81 ± 2.56

0.005

Locoregional invasive tumor (%)

25

54

64

0.044

Lymph node metastases (%)

0

25

36

0.012