Table 1.
Patient characteristics
| Total (n = 783) | < 75 years (n = 476) | ≥75 years (n = 307) | P value | ||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male, n (%) | 402 | ( | 51.3 | %) | 250 | ( | 54.1 | %) | 152 | ( | 47.4 | %) | 0.42 |
| Age in years, median (IQR) | 72 | [ | 65–78 | ] | 66 | [ | 60–71 | ] | 80 | [ | 76–83 | ] | < 0.001 |
| Body mass index in kg/m2, n (%) | |||||||||||||
| < 18.5 | 88 | ( | 11.2 | %) | 50 | ( | 10.8 | %) | 38 | ( | 11.8 | %) | 0.76 |
| 18.5–24.9 | 523 | ( | 66.8 | %) | 321 | ( | 69.5 | %) | 202 | ( | 62.9 | %) | |
| 25.0–29.9 | 137 | ( | 17.5 | %) | 85 | ( | 18.4 | %) | 52 | ( | 16.2 | %) | |
| ≥30 | 25 | ( | 3.2 | %) | 17 | ( | 3.7 | %) | 8 | ( | 2.5 | %) | |
| Unknown | 10 | ( | 1.3 | %) | 3 | ( | 0.6 | %) | 7 | ( | 2.2 | %) | |
| Tumor differentiation, n (%) | |||||||||||||
| Well | 188 | ( | 24.0 | %) | 110 | ( | 23.8 | %) | 78 | ( | 24.3 | %) | 0.28 |
| Moderate | 499 | ( | 63.7 | %) | 309 | ( | 66.9 | %) | 190 | ( | 59.2 | %) | |
| Poor | 29 | ( | 3.7 | %) | 14 | ( | 3.0 | %) | 15 | ( | 4.7 | %) | |
| Unknown | 67 | ( | 8.6 | %) | 43 | ( | 9.3 | %) | 24 | ( | 7.5 | %) | |
| Tumor location, n (%) | |||||||||||||
| Right colon | 331 | ( | 42.3 | %) | 179 | ( | 38.7 | %) | 152 | ( | 47.4 | %) | 0.001 |
| Left colon | 450 | ( | 57.5 | %) | 296 | ( | 64.1 | %) | 154 | ( | 48.0 | %) | |
| Unknown | 2 | ( | 0.3 | %) | 1 | ( | 0.2 | %) | 1 | ( | 0.3 | %) | |
| Charlson comorbidity index, n (%) | |||||||||||||
| 0 | 551 | ( | 70.4 | %) | 365 | ( | 79.0 | %) | 186 | ( | 57.9 | %) | < 0.001 |
| 1 | 40 | ( | 5.1 | %) | 20 | ( | 4.3 | %) | 20 | ( | 6.2 | %) | |
| 2 | 111 | ( | 14.2 | %) | 48 | ( | 10.4 | %) | 63 | ( | 19.6 | %) | |
| ≥3 | 81 | ( | 10.3 | %) | 43 | ( | 9.3 | %) | 38 | ( | 11.8 | %) | |
| Preoperative Barthel index, n (%) | |||||||||||||
| 0–20 | 19 | ( | 2.4 | %) | 6 | ( | 1.3 | %) | 13 | ( | 4.0 | %) | < 0.001 |
| 21–60 | 30 | ( | 3.8 | %) | 9 | ( | 1.9 | %) | 21 | ( | 6.5 | %) | |
| 61–90 | 40 | ( | 5.1 | %) | 24 | ( | 5.2 | %) | 16 | ( | 5.0 | %) | |
| 91–99 | 12 | ( | 1.5 | %) | 6 | ( | 1.3 | %) | 6 | ( | 1.9 | %) | |
| 100 | 681 | ( | 87.0 | %) | 431 | ( | 93.3 | %) | 250 | ( | 77.9 | %) | |
| Unknown | 1 | ( | 0.1 | %) | 0 | ( | 0.0 | %) | 1 | ( | 0.3 | %) | |
| Surgical approach, n (%) | |||||||||||||
| Open | 250 | ( | 31.9 | %) | 147 | ( | 31.8 | %) | 103 | ( | 32.1 | %) | 0.43 |
| Laparoscopic | 533 | ( | 68.1 | %) | 329 | ( | 71.2 | %) | 204 | ( | 63.6 | %) | |
| Postoperative complications, n (%) | |||||||||||||
| Yes | 80 | ( | 10.2 | %) | 39 | ( | 8.4 | %) | 41 | ( | 12.8 | %) | 0.022 |
| Postoperative Barthel index, n (%) | |||||||||||||
| 0–20 | 9 | ( | 1.1 | %) | 2 | ( | 0.4 | %) | 7 | ( | 2.2 | %) | < 0.001 |
| 21–60 | 28 | ( | 3.6 | %) | 7 | ( | 1.5 | %) | 21 | ( | 6.5 | %) | |
| 61–90 | 39 | ( | 5.0 | %) | 21 | ( | 4.5 | %) | 18 | ( | 5.6 | %) | |
| 91–99 | 13 | ( | 1.7 | %) | 7 | ( | 1.5 | %) | 6 | ( | 1.9 | %) | |
| 100 | 693 | ( | 88.5 | %) | 439 | ( | 95.0 | %) | 254 | ( | 79.1 | %) | |
| Unknown | 1 | ( | 0.1 | %) | 0 | ( | 0.0 | %) | 1 | ( | 0.3 | %) | |
| Adjuvant chemotherapy | |||||||||||||
| Yes | 462 | ( | 59.0 | %) | 349 | ( | 73.3 | %) | 113 | ( | 36.8 | %) | < 0.001 |
| IQR, interquartile range. | |||||||||||||