Opioid use at 24, 48 and 72 hours between the groups
| Variable | Catheter group, N=16 | Opioid Group, N=14 | Median difference (SE; 90% CIhigh) |
| Opioid day1 post surgery, µg/kg/hour, median (IQR) | 11.17 (6.83–20.2) | 15.56 (10.41–22.08) | −4.40 (4.1; 90% CIhigh 0.44) |
| Opioid day2 post surgery, µg/kg/hour, median (IQR) | 5.73 (1.68–15.06) | 9.17 (4.29–13.41) | −3.44 (4.3; 90% CIhigh 2.35) |
| Opioid day3 post surgery, µg/kg/hour, median (IQR) | 4.00 (0–11.48) | 4.44 (0–9.33) | −0.44 (4.1; 90% CIhigh 4.29) |