Relationship between red cell distribution width and contrast-induced nephropathy in patients who underwent primary percutaneous coronary intervention

Abstract

Objective: This study evaluated the relationship between contrast-induced nephropathy (CIN) and red cell distribution width (RDW) in patients who underwent primary percutaneous coronary intervention (PCI). Methods: A total of 359 patients with ST elevation myocardial infarction (STEMI) who had undergone primary PCI were included in the study. An increase of 25% in serum creatinine value after 48 h, or an increase of >0.5 mg/dL in the basal value was defined as CIN. Results: Of the patients included in the study, 49 (13.8%) developed CIN. Compared to the CIN-negative group, CINpositive patients had increased RDW values (16.9 +/- 2.00 and 14.8 +/- 2.14 respectively, p<0.001). The latter were also older patients, and had increased age rates of diabetes mellitus, baseline creatinine,Delta-creatinine and amount of contrast media were higher and left ventricular ejection fraction and baseline glomerular filtration rate (GFR) were lower in the CIN-positive group than in the CIN-negative group. A statistically weak correlation was found between RDW and change in creatinine levels (Delta-creatinine) (r=0.250, p=0.002). Diabetes mellitus (odds ratio [OR]: 3.252, 95% CI=1.184-8.951, p=0.022), high RDW (OR: 1.716, 95% CI=1.363-2.157, p<0.001), baseline low GFR (OR: 0.941, 95% CI=0.9250.971, p<0.001),Delta-creatinine (OR: 1.197, 95% CI=1.0612.986, p=0.006) and increased amount of contrast media (OR: 1.187, 95% CI=1.048-3.02, p=0.001) used were observed as independent predictors of CIN. Conclusion: The study found diabetes mellitus, high RDW, basal low GFR,Delta.creatinine and increased contrast amount used to be the independent predictors of CIN in STEMI patients who underwent PCI.