Statistical analysis
The primary outcome of this study was the time of the first postoperative analgesia. After reviewing the relevant literature [We used SPSS version 26.0 for the data analysis. Normally distributed data are expressed as the mean ± standard deviation, with two independent sample t tests. Count data are expressed as the rate (%). Grade data were analysed using the Mann–Whitney U test and are expressed as the median (M) and interquartile range (IQR). A 