Table 3.
Univariable Cox Regression Model Results.
| Variable | Category or Units | N | Hazard Ratio (95% C.I.) | P-Value |
| Gas | Nitrogen | 107 | 1.0 | 0.56 |
| Nitrous Oxide | 97 | 1.14 (0.73, 1.79) | ||
| Age | 10 Years | 204 | 1.12 (0.91, 1.36) | 0.29 |
| Gender | Male | 125 | 1.0 | 0.29 |
| Female | 79 | 1.27 (0.81, 2.00) | ||
| Hospital | AKH | 181 | 1.0 | 0.07 |
| SMZO | 23 | 0.91 (0.45, 1.83) | ||
| Number of Nodes examined | 1 Node | 194 | 1.00 (0.90, 1.11) | 0.98 |
| Number of involved Nodes | 1 Node | 194 | 1.17 (1.12, 1.22) | < 0.001 |
| Tumor Grade | G1 | 8 | 1.0 | 0.06 |
| G2 | 142 | 1.35 (0.33, 5.58) | ||
| G3 | 43 | 2.60 (0.61, 11.1) | ||
| G4 | 1 | -- | ||
| Treatment of Tumor | None | 86 | 1.0 | 0.01 |
| Chemotherapy | 60 | 1.84 (1.08, 3.16) | ||
| Radiation | 24 | 0.82 (0.33, 2.00) | ||
| Both | 28 | 2.39 (1.27, 4.50) | ||
| Log2(Preoperative CEA) | 1 (Doubling) | 144 | 1.32 (1.21, 1.44) | < 0.001 |
| Site | Ascending | 28 | 1.0 | 0.052 |
| Sigmoid | 58 | 2.99 (1.24, 7.25) | ||
| Rectum | 89 | 2.23 (0.94, 5.32) | ||
| Cecum | 23 | 1.36 (0.41, 4.45) | ||
| Multiple Colon Cancer | 2 | -- | ||
| Dukes Classification | A | 33 | 1.0 | < 0.001 |
| B | 58 | 1.27 (0.38, 4.21) | ||
| C | 71 | 5.23 (1.85, 14.7) | ||
| D | 31 | 16.5 (5.72, 47.7) | ||
| Dissemination | No | 153 | 1.0 | < 0.001 |
| Yes | 48 | 7.82 (4.89, 12.5) | ||
| Adjacent Organ Invasion | No | 142 | 1.0 | < 0.001 |
| Yes | 59 | 2.28 (1.44, 3.61) | ||
| Neural Invasion | No | 180 | 1.0 | < 0.001 |
| Yes | 19 | 3.26 (1.84, 5.77) | ||
| Vessel Invasion | No | 151 | 1.0 | < 0.001 |
| Yes | 48 | 3.37 (2.11, 5.36) |