Table 1.
Baseline and clinical characteristics of the study population
| Characteristics | Age < 55 | Age ≥ 55 | P value |
|---|---|---|---|
| N | 83 | 526 | / |
| Sex | |||
| Female | 42 (50.6%) | 230 (43.7%) | 0.24 |
| Male | 41 (49.4%) | 296 (56.3%) | |
| Mean age | 47.6 ± 5.1 years | 72.2 ± 8.5 years | / |
| Location | |||
| Right colon | 19 (22.9%) | 164 (31.2%) | / |
| Transverse | 5 (5.0%) | 31 (5.9%) | |
| Left Colon | 23 (27.7%) | 165 (31.4%) | |
| Upper rectum | 7 (8.4%) | 40 (7.6%) | |
| Mid rectum | 12 (14.5%) | 60 (11.4%) | |
| Lower rectum | 17 (20.5%) | 66 (12.5%) | |
| AJCC tumor stage (pT) | |||
| 1 | 5 (6.0%) | 83 (15.8%) | 0.023 |
| 2 | 17 (20.5%) | 96 (18.3%) | |
| 3 | 43 (51.8%) | 266 (50.5%) | |
| 4 | 18 (21.7%) | 81 (15.4%) | |
| AJCC nodal stage (pN) | |||
| 0 | 38 (45.8%) | 319 (60.7%) | 0.03 |
| 1 | 30 (36.1%) | 120 (22.8%) | |
| 2 | 15 (18.1%) | 87 (16.5%) | |
| UICC | |||
| I | 11 (13.3%) | 147 (28.0%) | 0.03 |
| II | 25 (30.1%) | 148 (28.1%) | |
| III | 23 (27.7%) | 129 (24.5%) | |
| IV | 24 (28.9%) | 102 (19.4%) | |