2.6. Statistical analysis
In assessing the data, SPSS v.25 statistical package program (IBM SPSS Inc, Chicago, IL, USA) has been used. Shapiro-Wilk test was used to control the normal distribution of data. Data with and without normal distribution were expressed as mean±standard deviation and median (range of quarters), respectively. Paired-Samples T-test (In parametric assumptions) and Wilcoxon test (For non-parametric assumptions) were used to investigate the relationship between the two dependent variables. The relationship between the parameters was made using Pearson or Spearman correlation analysis. p <0.05 was regarded as statistically significant.