Table 3 Univariate survival analyses of CRC patients in operated group according to various clinicopathological variables

Years of diagnosis

65.374

<0.001

1996-2000

75517

67.5%

2001-2005

127231

69.5%

Sex

2.520

0.112

Male

103083

69.0%

Female

99665

68.5%

Site

122.381

<0.001

Colon

127618

68.2%

Rectum

35530

71.6%

Age

1112.554

<0.001

15-30

1073

62.1%

31-40

4874

69.6%

41-50

17025

70.7%

51-60

35729

72.3%

61-70

48909

71.8%

71-80

58248

68.6%

>80

36890

60.1%

Race

0.036

0.850

Caucasian

166019

69.2%

African American

20149

61.6%

Others*

16580

72.4%

Pathological grading

812.382

<0.001

I- II

150521

72.0%

III-IV

38018

52.7%

Unknown

14209

77.2%

Histological Type

1162.165

<0.001

Adenocarcinoma

177748

70.0%

Mucinous/Signet ring cancer

25000

59.7%

AJCC stage

16776.287

<0.001

I

37364

92.6%

II

59213

81.5%

III

54234

61.3%

IV

27707

12.6%

Unknown

24230

81.8%

No. of LNs dissected

337.494

<0.001

<12

116783

69.6%

≥12

80248

69.0%

Unknown

5717

47.7%