Study end-points and definitions
CIN, acute kidney injury
SECONDARY, CIN
The primary endpoints were the incidence of Cys-based CIN defined as an increase in serum CyC concentration by 10% above the baseline value 24 hours after contrast media administration [The secondary end-point was to detect any acute kidney injury by a significant rise in cystatin C level between baseline and 24 hours in the two groups (Δ cystatin).The changes in renal biomarkers (Δ biomarkers) are defined as the difference between the follow-up level and the baseline level. These changes were compared between the two groups (AR and NR groups).We assessed the risk of CIN before the procedure using the Mehran score [