Statistical Analyses
Statistical analyses of the study were carried out with “statistical
package for social sciences” (SPSS) version 21.0 (SPSS INC., Chicago,
IL, USA) software. Categorical variables were noted in frequency and
percentage. The normal distribution of the data was analyzed with visual
(histogram and probability graphs) and analytical (Shapiro-Wilk test)
methods. The Wilcoxon test was used to compare the change between before
and after treatment. Mann-Whitney U test was used for analyzing the
variance between the groups because the variables did not have a normal
distribution. The level of significance was set at p< 0.05
[27].