Clinical Impact of Prediction with Prognostic Nutritional Index after Primary Isolated Coronary Artery Bypass Grafting

Objective: The aim of this study was to investigate the prognostic nutritional index (PNI) as a predictor of postoperative outcome after primary isolated coronary artery bypass grafting (CABG). Materials and methods: This retrospective cohort study included 164 patients who underwent primary isolated CABG. We assessed PNI and other nutritional parameters, and then examined the relationship with the postoperative outcome. To further evaluate the clinical significance of PNI, we also attempted to detect the PNI cut-off value for predictions. Results: Evaluation of the relationships between postoperative outcome and nutritional parameters assessed by using multivariable logistic or non-linear regression models showed that PNI was the only parameter that had a significant relationship with all of the postoperative complications (OR: 0.54, 95%CI: 0.30–0.97, p=0.012), the length of intensive care unit (ICU) stay (p=0.011), and the length of postoperative hospitalization (p=0.004). There was a significant difference for the postoperative complication (p<0.001), length of ICU stay (p=0.010) and length of postoperative hospitalization (p=0.004) between the two groups when divided by the 45.45 cut-off point. Conclusion: There was a significant relationship between PNI and postoperative outcome after primary isolated CABG. Preoperative nutritional assessment when using a PNI cut-off value of 45.45 might be a predictor.