Statistical analysis
Statistical analysis was done by SPSS 25 (IBM Corp., Armonk, NY, USA). Quantitative variables turned to be non-normally distributed using Kolmogorov–Smirnov. Quantitative data were presented as mean, standard deviation (SD) and range. Preoperative and postoperative data were compared using Wilcoxon Sign Rank test. While the quantitative data of both groups were compared using Mann–Whitney 