Table 3.
Operative outcomes
| ESSQS group (n = 586) | Non‐ESSQS group (n = 842) | P ‡ | |
|---|---|---|---|
| Duration of surgery (min) * | 230 (224–237) | 238 (234–244) | 0·045§ |
| Blood loss (ml) * | 51·7 (38·9–64·4) | 59·7 (49·0–70·4) | 0·342§ |
| Conversion | 16 (2·7) | 32 (3·8) | 0·270 |
| Intraoperative complication | 7 (1·2) | 30 (3·6) | 0·014 |
| Bleeding | 1 (0·2) | 13 (1·5) | 0·021 |
| Injury to intestinal tract | 2 (0·3) | 4 (0·5) | 0·999 |
| Injury to surrounding organs | 3 (0·5) | 8 (1·0) | 0·533 |
| Other | 1 (0·2) | 5 (0·6) | 0·424 |
| Postoperative complication † | 27 (4·6) | 63 (7·5) | 0·025 |
| Bleeding | 3 (0·5) | 3 (0·4) | 0·975 |
| Superficial SSI | 0 (0) | 3 (0·4) | 0·390 |
| Deep SSI | 2 (0·3) | 4 (0·5) | 0·999 |
| Anastomotic leak | 7 (1·2) | 31 (3·7) | 0·007 |
| Ileus | 4 (0·7) | 12 (1·4) | 0·291 |
| Cardiac, pulmonary or cerebral | 3 (0·5) | 0 (0) | 0·136 |
| Other | 8 (1·4) | 10 (1·2) | 0·956 |
| Reoperation | 11 (1·9) | 33 (3·9) | 0·023 |
| Bleeding | 1 (0·2) | 2 (0·2) | 0·990 |
| Deep SSI | 0 (0) | 1 (0·1) | 0·999 |
| Anastomotic leak | 4 (0·7) | 19 (2·3) | 0·035 |
| Ileus | 3 (0·5) | 4 (0·5) | 0·999 |
| Other | 3 (0·5) | 7 (0·8) | 0·697 |
| Postoperative hospital stay (days) * | 14·5 (13·6–15·4) | 16·3 (15·6–17·1) | 0·002§ |
| No. of harvested lymph nodes * | 18·0 (17·2–19·0) | 18·3 (17·6–19·1) | 0·681§ |
| Pathological R0 resection | 570 (97·3) | 832 (98·8) | 0·099 |
Values in parentheses are percentages unless indicated otherwise;
*
values are mean (95 per cent c.i.).
†
Grade III or above according to the Clavien–Dindo classification. ESSQS, Endoscopic Surgical Skill Qualification System.
‡
χ2 test, except §Student's t test.