Statistical method applied in data analysis
In the statistical analysis of the research, a SPSS 20.0 package program was used. In statistical analysis, data are defined as descriptive values, arithmetic average ± standard deviation, minimum, maximum, frequency, and in percentage (%). In the analysis of data, with the aim to determine whether a series is in conformity with normal distribution or not, the Shapiro-Wilk test is applied. 23,24 This test determines whether a series shows normal distribution or not. In the analysis of two independent groups revealing normal distribution, an unpaired t test is used, and, in the series showing distributions that are not normal, the Mann-Whitney U test was applied. For the comparison of three or more groups, regarding the series revealing normal distribution, a one way ANOVA test is used, and for the series showing distribution that is not normal, the Kruskal-Wallis H test applied. A correlation analysis is performed to determine whether there is a linear relationship between two numeric measurements and to determine the direction and intensity of a linear relationship, if it existed. In correlation analysis, in a case where the data has normal distribution, the Pearson correlation coefficient is preferred, and, in the case where the data did not have normal distribution, the Spearman Rank correlation coefficient is preferred. The analysis results obtained were interpreted by being evaluated within a reliance interval of 95% and a statistically significance level of p<0.05.