Fig. 1. Pain scores in the control group (gray bars ), bupivacaine-0.25% group (black bars ), and bupivacaine-0.5% group (white bars ) during the first 72 h after surgery as assessed by the patient using a verbal rating scale (VAS), with 0 = no pain to 10 = worst pain imaginable. *P < 0.05, values significantly different from those of the control group.