The analysis will be performed on the basis of intentionto-treat principles. Student’s t-test will be used to compare normally distributed variables, and Mann-WhitneyU test will be used to compare not-normally distributedcontinuous data. Categorical variables will be comparedwith the chi-square test. If univariable analysis reveals asignificant difference in baseline characteristics, then amultivariable linear regression analysis will be used toassess its impact on the primary outcome measure (thatis, change in serum creatinine between baseline and 48to 72 h after contrast administration).