*2.4. Statistical Analysis*

The results are expressed in means and standard deviations (SDs) for quantitative variables, and absolute frequencies and percentages for qualitative variables.

The Student's *t*-test was used for the comparative analysis of paired data. A *p*-value of <0.05 was considered statistically significant. Data were analyzed with the statistical software program SPSS version 24.0 (SPSS Inc.; Chicago, IL, USA).
