Outcome measurements during the study period
| ESPB group (n=39) | Control group (n=40) | P value*† | |
| Mean PACU discharge time (SD) (min) | 17.2 (2.7) | 28.4 (2.9) | <0.001 |
| Median cumulative opioid consumption (IQR) (μg) | 24 (24–28) | 40 (36–42) | <0.001 |
| Occurrence of PONV, n (%) | 3 (7.7) | 9 (22.5) | 0.07 |
| Occurrence of dizziness, n (%) | 1 (2.6) | 5 (12.5) | 0.20 |
*P value compares the ESPB group with the control group.
†t-test was used to compare means; Mann-Whitney U-test was used to compare medians; χ2 test was used to compare proportions of PONV; and Fisher’s exact test was used to compare proportions of dizziness.
ESPB, erector spinae plane block; IQR, interquartile range; PACU, postanesthesia care unit; PONV, postoperative nausea or vomiting; SD, standard deviation.