A Comparison of Oxycodone and Alfentanil in Intravenous Patient-Controlled Analgesia with a Time-Scheduled Decremental Infusion after Laparoscopic Cholecystectomy

Figure 3

Visual analogue scale of pain at resting between 1 and 48 h after the operation. Means and standard deviation are shown. values were calculated by repeated-measures analysis of variance. There were no significant differences between two groups ( value < 0.05). VAS: visual analogue scale.