Table 1 Clinicopathologic features of the colorectal cancer patients

Gender

 Male

79272

50.0

 Female

79211

50.0

Age*

68.45 ± 13.07

Race

 White

130774

82.5

 Black

14252

9.0

 Other

13457

8.5

Tumor location

 Colon

119903

75.6

 Rectum

38580

24.4

Histologic grade

 Well

13031

8.2

 Moderate

112228

70.8

 Poor

32108

20.3

 Undifferentiated

1116

0.7

Number of lymph nodes retrieved*

12.10 ± 8.87

pT category∫

 pT1

14149

8.9

 pT2

24573

15.5

 pT3

81507

51.4

 pT4a

9909

6.3

 pT4b

6982

4.4

pN category

 pN0

91722

57.9

 pN1a

19449

12.3

 pN1b

21198

13.4

 pN2a

14356

9.1

 pN2b

11758

7.4

pM category

 pM0

137120

86.5

 pM1

21363

13.5