Table 2.
Operative outcomes between the robotic assisted proctectomy group and laparoscopic assisted proctectomy group
| Operative outcomes | RAP (n = 293) | LAP (n = 293) | P value |
| Operative time, min | 171 ± 42, 160 (120-385) | 145 ± 42, 133 (80-350) | 0.0003 |
| Operative blood loss, mL | 106 ± 114, 80 (30-1500) | 138 ± 111, 100 (40-1200) | 0.0003 |
| Median time to first flatus, h | 57 ± 11, 56 (28-98) | 56 ± 9, 56 (28-100) | 0.5343 |
| Median time to liquid diet, h | 69 ± 10, 67 (38-108) | 69 ± 9, 69 (38-110) | 0.3963 |
| Median time to semi-liquid diet, h | 83 ± 10, 82 (51-122) | 83 ± 9, 83 (53-123) | 0.1943 |
| Median volume of pelvic drainage, mL | 362 ± 457, 290 (80-4020) | 465 ± 564, 310 (100-3820) | 0.000 3 |
| Median time to remove pelvic drainage tube, d | 7.1 ± 4.2, 6.0 (4.0-29.0) | 7.8 ± 4.9, 7.0 (4.0-28.0) | 0.0003 |
| Median time to remove urinary catheter, d | 3.2 ± 1.0, 3.0 (2.0-7.0) | 3.8 ± 1.2, 4.0 (2.0-14.0) | 0.0003 |
| Numbers of retrieved lymph nodes | 16.0 ± 3.8 | 15.7 ± 3.7 | 0.3492 |
| Perineural invasion | 0.5571 | ||
| Yes | 124 (42.3) | 117 (39.9) | |
| No | 169 (57.7) | 176 (60.1) | |
| Vascular invasion | 0.3341 | ||
| Yes | 91 (31.1) | 102 (34.8) | |
| No | 202 (68.9) | 191 (65.2) | |
| Distal resection margin, cm | 2.7 ± 0.6, 2.7 (1.8-7.1) | 2.5 ± 0.5, 2.5 (1.6-6.8) | 0.0003 |
| Conversion to open laparotomy | 7 (2.4) | 17 (5.8) | 0.0371 |
| Postoperative length of stay, d | 9.1 ± 4.9, 8.0 (5.0-32.0) | 9.2 ± 5.0, 8.0 (5.0-30.0) | 0.4613 |
1
Pearson's Chi-squared test, expressed as n (%).
2
Student’s t-test, expressed as mean ± SD.
3
Mann–Whitney U test, expressed as mean ± SD and median (range). LAP: Laparoscopic assisted proctectomy; RAP: Robotic assisted proctectomy; SD: Standard deviation.