2.5 | Statistics
Statistical analyses were performed with statistical software SPSS 15.0.
Comparisons between two independent groups were made by Student’s t-test
and by Mann Whitney U test.
More than two-group comparisons of numerical variables were made with
One Way ANOVA when the normal distribution condition was met in the
groups, and the Kruskal Wallis test when the normal distribution
condition was not met. Subgroup analyzes were made with the Mann Whitney
U test and interpreted with Bonferroni correction. In the dependent
groups, the numerical variables were analyzed with Paired t-test in two
dependent groups by repeated measurement variance analysis in more than
two groups, since the differences provided the normal distribution
condition. When the parametric test condition between numerical
variables was met, it was examined with Spearman Correlation Analysis
when it was not provided with Pearson Correlation Analysis. The
statistical alpha (level of significance) level was accepted as
p<0,05.