Risk factor | Hazard ratios (HR)a | 95% CI | P value | |
---|---|---|---|---|
Lower | Upper | |||
Age at diagnose (years) | ||||
≦ 60 | Referent | |||
> 60 | 1.52 | 1.17 | 1.98 | 0.002 |
Race | ||||
Other | Referent | |||
White | 1.87 | 0.96 | 3.66 | 0.07 |
Black | 2.07 | 0.98 | 4.37 | 0.05 |
SEER stage | ||||
Localized | Referent | |||
Regional | 4.96 | 2.89 | 8.53 | < 0.001 |
Distant | 16.91 | 9.95 | 28.73 | < 0.001 |
Treatment | ||||
Surgery | Referent | |||
No surgery | 3.01 | 1.97 | 4.62 | < 0.001 |
Grade | ||||
Well differentiated | Referent | |||
Moderately differentiated | 1.93 | 0.93 | 3.99 | 0.08 |
Poorly differentiated | 4.49 | 2.34 | 8.65 | < 0.001 |
Undifferentiated | 3.39 | 1.51 | 7.62 | 0.003 |
Regional lymph nodes | ||||
Negative | Referent | |||
Positive | 6.53 | 4.37 | 9.75 | < 0.001 |
Tumor size | ||||
≦ 2 cm | Referent | |||
> 2 cm | 3.62 | 2.20 | 5.97 | < 0.001 |
Tumor site | ||||
Appendix | Referent | |||
Colon | 1.81 | 1.22 | 2.69 | 0.003 |
Cecum | 2.11 | 1.43 | 3.13 | < 0.001 |