Ethical Considerations and Statistical Analysis
This retrospective study was approved by the Antalya Medical Park
Hospital Complex Ethics Committee (approval no: 2021/03) and was carried
out in accordance with the 1975 Helsinki Declaration. All statistical
analyses were performed using SPSS statistical software (SPSS for
Windows version 18.0; SPSS Inc, Chicago, IL, USA). Age and semen volume
were expressed as mean ± standard deviation. The normality of the data
distribution was assessed with Kolmogorov-Smirnov test. Age and semen
volume were compared using Kruskal-Wallis test, and Mann-Whitney U test
with Bonferroni correction was used for pairwise comparisons. Relative
differences in the distribution of normospermia and pathological
spermogram rates by year were compared with chi-square test. P values
less than 0.05 were accepted as statistically significant.