Statistical Analysis
Statistical analyses were performed using the SPSS software version 16. The variables were investigated using (histograms, probability plots) and analytical methods (Kolmogorov-Smirnov/Shapiro-Wilk’s test) to determine whether or not they were normally distributed. Descriptive analyses were presented using medians and interquartile range (IQR) for the non-normally distributed and ordinal variables. The proportions of patients with ATG use, preemptive transplantation, and BKVN were grouped by types of DJS using cross-tabulations. The Chi-square test or Fisher’s exact test, where appropriate, were used to compare these proportions in different groups. Blood creatinine measurements were not normally dis­tributed; nonparametric tests were conducted to compare these parameters. The Mann-Whitney U test was used to compare the relation­ship between blood creatinine levels and the use of the ARD-DJS.