Statistical analysis
The chi-square test used to analyze categorical variables, presented as numbers, and percentages. The Kolmogorov–Smirnov test was used to check the normality of continuous variables. Normally distributed continuous variables are presented as means with standard deviations and were analyzed with student’s t-test. Non-normally distributed continuous variables are presented as medians with interquartile ranges and were analyzed using the Mann–Whitney U-test. The Kaplan–Meier curve with the log-rank test was used for the survival analysis. SPSS for MAC ver. 26 (SPSS Inc., Chicago, IL, USA) was used for the statistical analysis. Statistical significance was set at a p-value of <0.05.