Table 1.
Patient characteristics (N = 594)
| Age in years, mean (SD1) | 72.6 (10.9) |
| Sex, N (%) | |
| Male | 340 (57.2%) |
| Female | 254 (42.8%) |
| BMI2 (kg/m2), mean (SD) | 26.6 (5.3) |
| Active smoking, N (%) | |
| Yes | 91 (15.3%) |
| No | 503 (84.7%) |
| Diabetes mellitus, N (%) | |
| Type I | 3 (0.5%) |
| Type II | 100 (16.8%) |
| No | 491 (82.7%) |
| Cardiac history, N (%) | |
| Yes | 61 (10.3%) |
| No | 533 (89.7%) |
| Pulmonary history, N (%) | |
| Yes | 67 (11.3%) |
| No | 527 (88.7%) |
| ASA3 classification, N (%) | |
| I | 48 (8.1%) |
| II | 345 (58.1%) |
| III | 193 (32.5%) |
| IV | 8 (1.3%) |
| Operation indication, N (%) | |
| Colorectal cancer | 579 (97.5%) |
| Local recurrence | 5 (0.8%) |
| Anal cancer | 3 (0.5%) |
| Ovarian cancer | 4 (0.7%) |
| Other4 | 8 (1.3%) |
| Stage of disease5, N (%) | |
| I | 178 (30.0%) |
| II | 181 (30.5%) |
| III | 180 (30.3%) |
| IV | 35 (5.9%) |
1SD standard deviation
2BMI body mass index
3ASA American Society of Anesthesiologists
4Indications classified as ‘other’: lymphoma (n = 2), sarcoma (n = 2), melanoma (n = 1), appendiceal carcinoma (n = 2), endometrial carcinoma (n = 1)
5Only applicable for primary tumours, colorectal cancer