Table 1. Clinical Data for 842 Patients Undergoing Major Colorectal Surgery, 2016-2019.
| Characteristic | Patients, No. (%) |
|---|---|
| Age, mean (SD), y | 64.6 (15.5) |
| Sex | |
| Male | 421 (50) |
| Female | 421 (50) |
| BMI, median (range) | 25.3 (15.1-41.0) |
| ASA score | |
| I | 104 (12) |
| II | 545 (65) |
| III | 192 (23) |
| IV | 1 (0.12) |
| Diagnosis | |
| Malignant disease | 509 (60) |
| Inflammatory bowel disease | 130 (15) |
| Diverticular disease | 88 (10) |
| Other benign disease | 115 (14) |
| Magnitude of surgery | |
| Abdominal | 600 (71) |
| Abdomino-pelvic | 242 (29) |
| Regional analgesia | |
| Epidural | 604 (72) |
| Spinal | 231 (27) |
| No block | 7 (1) |
| Surgical approach | |
| Minimally invasive surgery | 608 (72) |
| Open surgery | 234 (28) |
| Individualized opioid treatment | |
| Yes | 534 (63) |
| No | 308 (37) |
| Gabapentin | |
| Treated | 661 (79) |
| Untreated | 181 (21) |
| Clonidine | |
| Treated | 246 (29) |
| Untreated | 596 (71) |
Abbreviations: ASA, American Society of Anesthesiologists; BMI, body mass index (calculated as weight in kilograms divided by height in meters squared).