Statistical analysis
Overall survival was expressed as the time from the moment of diagnosis to the death of the patient or the last follow-up period, and recurrence-free survival (RFS) was expressed as the time from the moment of diagnosis until the BCR which means the PSA values were detected above ≥0.2 ng/ml in two separate measurements in the postoperative period or the death of the patients. All data were summarized as numbers and percentages for statistical analysis. The HP features and clinical and prognostic data obtained were compared. In the statistical analysis of the data, ”SPSS 24.0 for Windows” (IBM, Chicago, IL, USA) program was used. While evaluating the study data, besides descriptive statistical methods (mean, standard deviation), the chi-square test was used to examine the relationship between parametric values ​​in comparison of categorical data, and Fisher exact test was used to compare two non-parametric groups. Mann Whitney U test was used for the analysis of variables that did not show normal distribution. Logistic regression analysis was used for the rate at which the independent variables affect the dependent variable. Kaplan-Meier analysis was used to calculate survival probabilities. Results were analyzed at a 95% confidence interval. p≤0.05 was considered as statistically significant.