Preoperative neutrophil–lymphocyte ratio, an independent risk factor for postoperative cognitive dysfunction in elderly patients with gastric cancer

Aim This study aimed to investigate the potential risk factors for postoperative cognitive dysfunction (POCD) in elderly patients with gastric cancer (GC) after radical gastrectomy. Methods In total, 221 elderly patients with GC who were scheduled to undergo selective radical gastrectomy in our hospital were enrolled in this study. To define early POCD, the neuropsychological assessment was carried out 1 day before surgery and 7 days after surgery. Receiver operating characteristic curve analysis was carried out to evaluate the predicative and cut‐off values of risk factors, including neutrophil–lymphocyte ratio (NLR) for early POCD. The univariate and multivariate logistic regression analyses were performed to investigate risk factors for early POCD. Results Of the 221 enrolled elderly patients with GC, 42 were identified as early POCD with an incidence of 19.0% (42 of 221). Receiver operating characteristic curve analysis indicated that NLR was a significant predictor for POCD with a cut‐off value of 2.50 and an area under the curve of 0.711 (95% confidence interval: 0.624–0.798, P