PRL and diabetes mellitus: The analysis showed that except for the subgroup of patients with DM, the incidence of CIN in the other subgroups with the classic RF for CIN is higher than the general incidence of 14.4%: DM = 13.1%, anemia = 18.8%, HF = 15%, age ≥65 vjeç = 17.7%, LRP (GFR <60 ml/min) = 18.9% (Table 4) According to the binary logistic regression, the following resulted in an independent RF for CIN: PRL (GFR <60 ml/min or SCr >1.5 mg/dL before the procedure), age ≥65, and HF (Table 5).