Patient recruitment
failure of epidural puncture
In the study, a total of 120 participants were enrolled initially and three participants were excluded during the trial. One case was excluded for failure of epidural puncture, and another one was for changed to cesarean section in Group E, while one participant was excluded for failure of epidural puncture in Group C. Finally, There were 117 participants included in the statistical analysis (58 in Group E and 59 in Group C, respectively. Figure 