Statistical analysis:
Statistical analyzes were performed using SPSS software version 15. The
conformity of the variables to the normal distribution was examined
using visual (histogram and probability graphs) and analytical methods
(Kolmogorov-Smirnow/Shapiro Wilk tests). Descriptive analyzes were given
using median and minimum-maximum values for non-normally distributed
variables. In addition, mean, standard deviation values and ordinal
variables were given using frequency tables. Wilcoxon test was used for
in-group rank pairwise comparisons. Friedman test was used to compare
data with more than two repetitive measurements. If required, pairwise
comparisons were made using the Wilcoxon test and evaluated using
Bonferroni correction. Ordinal variables in 2 related samples were
compared with McNemar test. Correlation coefficients and statistical
significance for the relationships between parameters were calculated by
Spearman’s test. The p value was taken as 0.05 for statistical
significance.