Statistical Method
The IBM SPSS Statistics (version 22.0 IBM Corp., Armonk, NY) software
program was used to analyze the data. Categorical variables are
presented as numbers (n) or percentages (%), continuous variables are
presented as median (25th-75th percentiles). Correlation analysis and
comparisons were performed using Spearman’s correlation analysis,
Wilcoxon test and Chi-square test were used for the analysis of
non-normally distributed data. A p-value < 0.05 was considered
significant.