Table 3. Cox regression multivariate analysis of variables affecting survival.
| |
|
95% Confidence interval |
|
|
|---|---|---|---|---|
| Variables | Hazard ratio | Lower | Upper | Significance (P-value) |
| Age (per year) |
1.01 |
0.95 |
1.08 |
0.730 |
|
Sex | ||||
| Female | 1.00 | |||
| Male |
0.95 |
0.63 |
1.43 |
0.806 |
|
Diagnostic category | ||||
| Interval | 1.00 | |||
| Screen-detected |
0.45 |
0.29 |
0.69 |
<0.001 |
|
Index of multiple deprivation quintile category | ||||
| Most affluent | 1.00 | |||
| 2 | 0.75 | 0.29 | 1.92 | 0.549 |
| 3 | 1.02 | 0.44 | 2.34 | 0.962 |
| 4 | 1.78 | 0.79 | 4.02 | 0.168 |
| Most deprived |
2.01 |
0.92 |
4.40 |
0.079 |
|
ASA grade | ||||
| ASA 1–2 | 1.00 | |||
| ASA 3–5 |
1.56 |
0.90 |
2.72 |
0.114 |
|
Tumour site | ||||
| Distal to splenic flexure | 1.00 | |||
| Splenic flexure and proximal |
1.84 |
1.19 |
2.83 |
0.006 |
|
Dukes' stage | ||||
| Dukes' A | 1.00 | |||
| Dukes' B | 3.85 | 1.41 | 10.54 | 0.009 |
| Dukes' C | 6.51 | 2.49 | 16.97 | <0.001 |
| Dukes' D | 35.30 | 13.57 | 91.87 | <0.001 |
Abbreviation: ASA=American Society of Anaesthesiologists.