Table 1.
Demographic and clinical characteristics at baseline
| Characteristic | n (%) |
|---|---|
| Total | 1,489 |
| Age | |
| Mean ± SD, years | 70.5 ± 9.2 |
| Missing | 0 (0) |
| Sex | |
| Male | 778 (52) |
| Female | 709 (48) |
| Missing | 2 (0) |
| Socioeconomic status | |
| Low | 321 (21) |
| Medium | 589 (39) |
| High | 518 (35) |
| Missing | 61 (5) |
| Time since diagnosis | |
| Mean ± SD, years | 5.1 ± 2.9 |
| Missing | 0 (0) |
| Number of comorbidities | |
| None | 329 (22) |
| 1 | 394 (27) |
| > 1 | 678 (46) |
| Missing | 76 (5) |
| TNM stage | |
| I | 365 (24) |
| II | 664 (45) |
| III | 460 (31) |
| Missing | 0 (0) |
| Differentiation grade | |
| Poorly differentiated | 210 (14) |
| Moderately differentiated | 986 (66) |
| Well differentiated | 160 (11) |
| Missing | 133 (9) |
| Topography | |
| Distal | 812 (55) |
| Proximal | 677 (45) |
| Missing | 0 (0) |
| Histology | |
| Adenocarcinoma | 1,287 (87) |
| Mucinous | 198 (13) |
| Signet ring cell | 4 (0) |
| Missing | 0 (0) |
| Treatment | |
| Surgery only | 1,032 (69) |
| Surgery and chemotherapy | 457 (31) |
| Missing | 0 (0) |