| Blood transfusion (mL) |
| 0 (0 - 0) | 0 (0 - 0) | 0 (0 - 0) | 0.99 |
| Urine volume (mL) |
| 155 (968 - 2388) | 1573 (1025 - 2455) | 1425 (680 - 2310) | 0.22 |
| Balance (mL) |
| 2680 (2195 - 3448) | 2668 (2216 - 3515) | 2680 (2095 - 3305) | 0.61 |
| Detection of lymph node metastasis | Yes/No | 48/57 | 31/49 | 17/8 | <0.05 |
| Total use of remifentanil (μg) |
| 13,573 (10,217 - 18,074) | 13,791 (10,457 - 18,717) | 12,591 (9096 - 17,161) | 0.40 |
| Total use of fentanyl (μg) |
| 800 (600 - 1000) | 800 (600 - 1000) | 800 (600 - 860) | 0.81 |
| Epidural use of morphine | Yes/No | 68/37 | 52/28 | 16/9 | 1.00 |
| Fentanyl equivalents exchange (μg) |
| 14,303 (10,949 - 18,924) | 14,529 (11,566 - 19,559) | 13,390 (9763 - 17,971) | 0.37 |