Statistical analysis
Statistical analysis was carried out using software GraphPad Prism 6.01.
Quantitative data were expressed as mean ± standart deviation (SD). For
comparison between groups of patients and of healthy volunteers, the
Mann-Whitney U test for continuous variables for 2-group comparisons was
used. Fisher’s exact test was used for the analysis of data also. Odds
ratio (OR) and 95% confidence interval (CI) were calculated. The
Spearman correlation was used to analyze the relativeness of the study
parameters. Statistical significance was considered as
p<0.05.