Table 1 Grouping of DT classifiers

Mean age (year)

56.55

58.37

0.506

0.479

Gender (n)

0.036

0.529

 Male

41

19

 Female

19

8

Amounts of collagen fibers (n)

0.242

0.399

 Large

41

17

 Small

19

10

Mean maximum tumor diameter (cm)

4.688

4.459

0.224

0.637

Nuclear grading (n)

0.645

0.293

 High

13

8

 Low

47

19

Tumor stage (n)

5.175

0.159

 I

36

21

 II

6

3

 III

9

3

 IV

9

0

Envelope (n)

0.074

0.483

 Presence

33

14

 Absence

27

13

Necrotic areas (n)

 < 0.001

0.601

 Presence

40

18

 Absence

20

9