Table 2 Comparison of treatment effects between the observation and control groups
|  | Observation group (n = 23) | Control group (n = 20) | Value of statistics t/z或χ2 | P |
|---|---|---|---|---|
Operation time (min) | 230.0 (205.0, 280.0) | 202.5 (173.8, 315.0) | z = 0.939 | 0.348 |
Blood loss (ml) | 50.0 (50.0, 100.0) | 50.0 (50.0, 100.0) | z = 0.527 | 0.598 |
Postoperative anal exhaust time (d) | 3.0 (3.0, 4.0) | 2.5 (2.0, 3.8) | z = 1.221 | 0.222 |
Postoperative hospital stay (d) | 12.2 ± 4.4 | 19.3 ± 5.8 | t = 4.577 | 0.000 |
The number of lymph node dissections [PCS] | 18.5 ± 5.9 | 15.6 ± 7.8 | t = 1.395 | 0.171 |
Overall postoperative complicationsa[n (%)] | 2 (8.7) | 8 (40) | χ2 = 5.874 | 0.015 |
Postoperative wound infection | 1 (4.3) | 1 (5.0) | 1.000 | |
Subcutaneous fluid collection | 0 | 1 (5.0) | 0.465 | |
Postoperative intra-abdominal infection | 1 (4.3) | 1 (5.0) | 1.000 | |
Pulmonary infection | 1 (4.3) | 1 (5.0) | 1.000 | |
Postoperative incomplete intestinal obstruction | 0 | 4 (20.0) | 0.039 | |
Postoperative circulatory complications | 0 | 1 (5.0) | 0.465 |