Statistical analysis StataCorp Stata 15 was used for statistical analysis. The Fisher's exact test was applied to compare categorical variables; and the Student's t-test was used to compare quantitative variables between the two treatment groups. A mixed model with random effect and Bonferroni correction was applied to compare IPSS, QoL, Qmax, and PVR between two groups. A two-sided P-value of < 0.05 was considered statistically significant.