highly significantp < 0.001
During the first 12 h of the postoperative course, patients in the QLB group received an average of 4.13 (+/− 3.29) mg of morphine, which is approximately 5.6 mg of morphine (95% CI 3.44; 7.77) less than the control group without the block, who received an average of 9.73 (+/− 4.93) mg (Student’s T-test for independent samples, p < 0.001, the difference between the groups is statistically highly significant) ( Table 2 ).