Table 1.
Comparison of patient with open and laparoscopic resection for colorectal cancer
| Open | Laparoscopic | p values | |
|---|---|---|---|
| n = 1197 | n = 814 | ||
| Male/female | 702:495 | 455:359 | 0.232 |
| Median age (years) | 71 (61–77)a | 70 (61–78)a | 0.472 |
| Colon | 631 (52.7%) | 468 (57.5%) | 0.036 |
| Rectum | 566 (47.3%) | 346 (42.5%) | |
| Presence of medical diseases | 687 (57.4%) | 473 (58.1%) | 0.748 |
| ASA class 3–5 | 261(21.8%) | 153 (18.8%) | 0.081 |
| Operating time (min) | 130 (105–169)a | 180 (141–218)a | <0.001 |
| Blood loss (ml) | 200 (100–450)a | 100 (50–200)a | <0.001 |
| Complications | 335 (28.0%) | 141 (17.3%) | <0.001 |
| Operative mortality (30 days) | 23 (1.9%) | 4 (0.5%) | 0.005 |
| Stage I | 148 (12.4%) | 152 (18.6%) | 0.001 |
| Stage II | 476 (39.8%) | 285 (35.0%) | |
| Stage III | 400 (33.4%) | 246 (30.2%) | |
| Stage IV | 173 (14.5%) | 131 (16.1%) | |
| Median distal margin (cm) | 4.0 (2.5–6.0)a | 4.0 (2.5–6.0)a | 0.374 |
| Size of tumors (cm) | 4.0 (3.0–6.0)a | 4.0 (3.0–5.0)a | 0.005 |
| Differentiation | <0.001 | ||
| Well | 65 | 48 | |
| Moderate | 1,009 | 725 | |
| Poor | 123 | 41 | |
| Lymphovascular permeation | 382 | 239 | 0.238 |
| Median no. of lymph nodes examined | 11 (7–16) | 13 (8–18)a | p < 0.001 |
| Perineural invasion | 168 | 100 | 0.285 |
| Median hospital stay | 8 (6–11)a | 5 (4–8)a | <0.001 |
| Reoperation | 41 (3.4%) | 26 (3.2%) | 0.802 |
ASA American Society of Anesthesiology class
aFigures in parenthesis are interquartile range