Figure 1. Visual analog scale (median). At 0 h, visual analog scale was significantly lower in group C than in groups A, B, and P, (*P < 0.001); no differences were detected among the other groups. At 4 h, values for group C were significantly lower than for groups A, B, and P (*P < 0.015), and values for group P were lower than for group A (sup o P < 0.001). At 8, 12, and 24 h, values for groups C and P were lower than for A and B, (*P < 0.001); group A recorded higher values than B (sup o P < 0.01). Statistical analysis: Kruskal-Wallis test and Wilcoxon rank-sum test.