Table 1.
Patient and tumor characteristics.
| Number of patients | Whole set of patients n (%) |
|---|---|
| 593 (100) | |
| Median age, years (range) | 68.8 (27–96) |
| ≤70 years, n (%) | 316 (53.3) |
| >70 years, n(%) | 277 (46.7) |
| Gender, n (%) | |
| Male | 362 (61) |
| Female | 231 (39) |
| Sex ratio: Male/Female | 1.5 |
| WHO Performance Status, n (%) | |
| 0–1 | 549 (92.6) |
| 2–3 | 44 (7.4) |
| Body mass index, n (%) | |
| <18.5 | 21 (3.5) |
| 18.5–29.9 | 502 (84.7) |
| ≥30 | 70 (11.8) |
| Location, n (%) | |
| Lower rectum | 252 (42.5) |
| Middle rectum | 249 (42.0) |
| Upper rectum | 88 (14.8) |
| Missing data | 4 (0.7) |
| Tumor Histology, n (%) | |
| Adenocarcinoma | 587 (99.0) |
| Other | 6 (1.0) |
| Tumor differenciation, n (%) | |
| Well | 229 (38.6) |
| Moderate | 278 (46.9) |
| Poor | 31 (5.2) |
| Missing Data | 55 (9.3) |
| Radiologic tumor staging, n (%) | |
| Stage I | 49 (8.2) |
| Stage II | 192 (32.4) |
| Stage III | 315 (53.2) |
| Missing data (Tx and/or Nx and M0) | 37 (6.2) |
| Primary tumor resection, n (%) | |
| Yes | 552 (93.1) |
| No | 41 (6.9) |
Q1: first quartile, Q3: third quartile, n: number of patients, Tx: unknown tumor staging, Nx: unknown node involvement staging, Tumor staging was based on UICC, 7th edition (2009).