Sample size and statistical analyses
The sample size was determined based on a pilot research that revealed the 24 h postoperative QoR-15 scores for the groups R, RD1, and RD2 were 106.3 ± 11.3, 110.6 ± 12.4, 116.7 ± 16.8, respectively. The minimum desired clinical difference between the groups was an 8-point difference for the QoR-15 score [Statistical analysis was performed using SPSS 25.0 software (SPSS 25, Chicago, IL, USA). The Kolmogorov-Smirnov test was employed to evaluate the normality of the data distribution. The continuous variables were presented as mean (SD) or median (interquartile range), as appropriate. Normally distributed continuous data were analyzed with one-way analysis of variance tests and non-normally distributed continuous data were analyzed using the non-parametric Kruskal-Wallis H test. The categorical variables were presented as numbers (percentages) and analyzed using the 