Table 2.
Postoperative parameters
| Group C (n = 21) | Group RO (n = 21) | Group RD (n = 19) | P value | |
|---|---|---|---|---|
| VAS (first defecation) | 41.00 | 29.00 | 21.00 | <0.001* |
| (30.50–45.00) | (22.00–36.00) † | (19.00–24.00) †‡ | ||
| Fentanyl (ug) | 765.95 ± 106.34 | 635.19 ± 82.73† | 537.74 ± 65.88†‡ | <0.001 |
| Frequency to push the button of PCA (n) | 30.00 | 12.00 | 10.00 | <0.001* |
| (25.00–35.00) | (9.00–23.00) † | (6.00–12.00) †‡ | ||
| PONV (n) | 4 (19.0) | 3(14.3) | 2(10.5) | 0.748 |
| Urinary retention (n) | 2 (9.5) | 2 (9.5) | 1(5.3) | 0.854 |
VAS Visual Analogue Score of pain; PCA Patient-controlled analgesia machine; n number of patients; PONV postoperative nausea and vomiting. Values are expressed as mean ± SD, except for PONV, gender and urinary retention which are number of patients (proportion). * Kruskal–Wallis test is used and expressed as median (interquartile range) because of abnormal distribution. † P < 0.05 compared with Group C, ‡ P < 0.05 comparison between Group RO and Group RD