Fig. 4. Patient satisfaction with their postoperative pain management during the first 72 h after surgery in the control group (gray bars ), bupivacaine-0.25% group (black bars ), and bupivacaine-0.5% group (white bars ) on a 100-point verbal rating scale, with 1 = highly dissatisfied to 100 = highly satisfied. *P < 0.05, values significantly different from those of the control group.