Statistics
The data were analyzed by using the SPSS 21.0 (IBM, USA) statistical
package program. Descriptive statistics for numerical variables were
given as mean, standard deviation or, median and minimum and maximum.
Descriptive statistics for categorical variables were given as numbers
and percentages. Shapiro-Wilk test was used to determine the normal
distribution of the groups. For normal distribution data, differences
between more than two groups were compared with ANOVA test. For
abnormally distributed data, differences between more than two groups
were compared with Kruskal-Wallis test. The comparison of parameters
before and after dialysis was performed with the paired sample t-test in
the normal distribution data and Wilcoxon signed rank questionnaire in
abnormally distributed data. Pearson correlation test was used for
correlation analysis. Statistical significance level was accepted as p
<0.05.