|  | NE group (≤75 years); n = 738 | E group (> 75 years); n = 162 | p value |
---|---|---|---|---|
Type of surgery; n (%) | Sigmoid resection | 214 (29.0%) | 43 (26.5%) | 0.565 |
Rectal resection | 524 (71.0%) | 119 (73.5%) | ||
Approach of surgery; n (%) | Open | 349 (47.3%) | 93 (57.4%) | 0.024 |
Minimally invasive | 389 (52.7%) | 69 (42.6%) | ||
Operation time, minutes (mean ± SD) | 147 ± 60 | 150 ± 67 | 0.190 | |
Blood loss, ml (median; Q1, Q3) | 50 (Q1: 50; Q3: 100) | 100 (Q1: 50; Q3: 162) | 0.522 | |
Anastomosis level from anal verge; n (%) | ≤5 cm | 145 (23.7%) | 29 (22.3%) | 0.860 |
6–12 cm | 239 (39.0%) | 54 (41.5%) | ||
> 12 cm | 229 (37.3%) | 47 (36.2%) | ||
Diverting ileostomy; n (%) | Yes | 302 (40.9%) | 72 (44.4%) | 0.429 |
No | 436 (59.1%) | 90 (55.6%) | ||
Postoperative hospitalization; days (mean ± SD) | 10 ± 6 | 13 ± 11 | 0.001 | |
Retrieved lymph nodes; n (%) | < 12 | 130 (17.6%) | 18 (11.1%) | 0.046 |
≥12 | 608 (82.4%) | 144 (88.9%) | ||
Postoperative complications; n (%) | Yes | 219 (29.7%) | 60 (37.0%) | 0.066 |
No | 519 (70.3%) | 102 (63.0%) | ||
Severe complications by Clavien-Dindo score III-V; n (%) | 73 (9.8%) | 25 (15.4%) | 0.040 | |
30-day mortality; n (%) | 7 (0.9%) | 5 (3.1%) | 0.048 | |
90-day mortality; n (%) | 12 (1.6%) | 12 (7.4%) | 0.001 |