Table 1.
Baseline characteristics of 1095 colorectal cancer patients by tumor location
| Characteristic | Right colon (%) | Left colon (%) | P value |
|---|---|---|---|
| N = 249 (22.7 %) | N = 846 (77.3 %) | ||
| Age (years, mean ± SD) | 64.94 ± 13.49 | 63.82 ± 12.85 | 0.233 |
| Gender | 0.118 | ||
| Female | 119 (47.8) | 357 (42.2) | |
| Male | 130 (52.2) | 489 (57.8) | |
| Tumor size | 0.003* | ||
| < 5 cm | 121 (48.8) | 495 (59.4) | |
| ≥ 5 cm | 127 (51.2) | 339 (40.6) | |
| Histology | <0.001* | ||
| Well | 20 (8.2) | 51 (6.2) | |
| Moderately | 181 (74.5) | 704 (85.7) | |
| Poorly | 42 (17.3) | 66 (8.0) | |
| AJCC Stagea (Initial diagnosis) | 0.016* | ||
| I | 28 (11.2) | 164 (19.4) | |
| II | 101 (40.6) | 286 (33.8) | |
| III | 80 (32.1) | 251 (29.7) | |
| IV | 40 (16.1) | 145 (17.1) | |
| Tumor depth | 0.017* | ||
| T1 | 12 (4.8) | 59 (7.0) | |
| T2 | 24 (9.7) | 139 (16.5) | |
| T3 | 199 (80.3) | 591 (70.4) | |
| T4 | 13 (5.2) | 51 (6.1) | |
| Lymph Node metastasis | 0.677 | ||
| N0 | 142 (57.3) | 491 (58.7) | |
| N1 | 62 (25.0) | 217 (25.9) | |
| N2 | 44 (17.7) | 129 (15.4) | |
| Lymph Node metastasis | 0.694 | ||
| No | 142 (57.3) | 491 (58.7) | |
| Yes | 106 (42.7) | 346 (41.3) | |
| Vascular invasion | 0.529 | ||
| No | 163 (66.5) | 561 (68.7) | |
| Yes | 82 (33.5) | 256 (31.3) | |
| Perineural invasion | 0.833 | ||
| No | 157 (63.8) | 516 (63.1) | |
| Yes | 89 (36.2) | 302 (36.9) | |
| Pre-op serum CEAb level | 0.496 | ||
| < 5 ng/ml | 121 (51.5) | 424 (54.0) | |
| ≥ 5 ng/ml | 114 (48.5) | 361 (46.0) | |
| Post-op serum CEAb level | 0.023* | ||
| < 5 ng/ml | 158 (68.1) | 594 (75.6) | |
| ≥ 5 ng/ml | 74 (31.9) | 192 (24.4) | |
| Pre-op serum Albumin level (g/dl) | 3.56 ± 0.44 | 3.63 ± 0.45 | 0.062 |
| Diabetes mellitus | 0.731 | ||
| Yes | 60 (24.1) | 195 (23.0) | |
| No | 189 (75.9) | 651 (77.0) | |
| Chemotherapy | 0.427 | ||
| Yes | 161 (64.9) | 570 (67.6) | |
| No | 87 (35.1) | 273 (32.4) | |
| Cardiac disease | 0.764 | ||
| Yes | 103 (41.4) | 359 (42.4) | |
| No | 146 (58.6) | 487 (57.6) | |
| Renal disease | 0.690 | ||
| Yes | 13 (5.2) | 39 (4.6) | |
| No | 236 (94.8) | 807 (95.4) | |
| BMIc | 23.53 ± 4.25 | 23.63 ± 3.62 | 0.758 |
aAJCC American Joint Commission on Cancer
bCEA Carcinoembryonic antigen
cBMI Body mass index
*Indicated P < 0.05