2.5. Statistical evaluation
The data obtained from the study were evaluated using the Statistical Package for Social Sciences (SPSS) 21.0 program. Continuous variables obtained by measurement were expressed as mean ± standard deviation, and categorical variables were expressed as percentage and number. The normality of distribution was analyzed with the Kolmogorov–Smirnov test. Student’s t-test was used to compare means between two independent groups with normal distribution, and the non-parametric Mann–Whitney U test was used for groups that did not show normal distribution. Chi-square and Fisher’s exact test were used to compare the categorical data. In order to determine the direction and level of the relationship between numerical variables, Pearson’s test was used for those with normal distribution, and Spearman’s correlation test was used for those that did not show normal distribution. In all analyses, p<0.05 was considered statistically significant.