Fig. 2

Cumulative morphine requirement of QLB versus continuous epidural analgesia. Median (95% CI) values of cumulative morphine requirement (mg) after anesthesia recovery at each time point are as follows: 2 h, 0 (0.34–1.05) vs 0 (0.28–1.10) (p = 0.857); 6 h, 2 (0.69–2.08) vs 2 (0.68–1.93) (p = 0.977); 12 h, 3 (1.11–2.74) vs 3 (0.97–2.49) (p = 0.764); 24 h, 3 (0.69–2.62) vs 4 (0.66–1.88) (p = 0.792). The p-values were analyzed using Mann-Whitney test, the horizontal lines indicate medians; boxes indicate interquartile range; whiskers indicate range