Table 4 Cox proportional hazard model for survival status

Age (y)

0.99 (0.95-1.03)

0.99 (0.96-1.04)

Lymph node ratio^†

1.08 (1.03-1.13)*

-

Gender

 Female

 Male

2.49 (0.69-9.06)

1.16 (0.28-4.81)

Location of tumor

 Colon

Reference

-

 Rectum

1.06 (0.36-3.16)

-

Depth of invasion

 T1/T2

Reference

Reference

 T3

2.15 (0.46-10.12)

3.9 (0.62-24.42)

 T4

0.70 (0.12-4.17)

0.76 (0.11-5.36)

Stage

 I

Reference

-

 II

0.81 (0.08-7.75)

-

 III

3.67 (0.47-29.00)

-

Tumor grade

 I

Reference

-

 II

0.93 (0.12-7.31)

-

 III

0.81 (0.07-9.03)

-

Upstage

 N0(i+)

10.28 (1.44-73.34)*

20.32 (2.09-197.98)*

 N0

Reference

Reference

 N+

7.93 (1.71-36.83)*

10.06 (2.04-49.58)*

HE examination

 Negative

Reference

-

 Positive

4.82 (1.48-15.70)*

-

SLN examination

 Negative

Reference

-

 Positive

1.50 (0.33-6.84)

-