2.7 Statistical Analysis
Biostatistical analysis of the data obtained was performed with SPSS
(Statistical Package for Social Sciences) for Windows v. 21.0 package
software. The normality of the data was analyzed with the
Kolmogorov-Smirnov test. Continuous variables were expressed as mean ±
standard deviation and categorical variables with frequency and
percentage (%). Descriptive statistics regarding normally distributed
variables were expressed as mean ± standard deviation. Whereas,
non-normally distributed variables were given with median, minimum, and
maximum values. In the statistical evaluations, correlations between
categorical variables were examined with the Chi-square test, while
Pearson’s correlation analysis was used to determine the direction and
level of the correlations between the variables. Normally distributed
variables were analyzed using Student t test, and non-normally
distributed variables were analyzed using Mann-Whitney U and
Kruskal-Wallis tests. p<0.05 values considered statistically
significant.