Clinical characteristics and predictors of permanent stoma in rectal cancer patients underwent anterior resections: the value of preoperative prognostic nutritional index.

Abstract

This study was aimed to investigate the correlation between preoperative prognostic nutritional index (PNI) and permanent stoma (PS) in patients with defunctioning stoma (DS) after anterior resections and, based on it, to reveal the clinical value of PNI on clinical strategies about the selection of stoma location. A total of 281 consecutive rectal cancer patients who accepted anterior resection and DS in the National Hepatobiliary and Enteric Surgery Research Center, Xiangya Hospital, Central South University from June 2008 to June 2018 were enrolled in this study. Receiver operating characteristic (ROC) curve for PNI was performed to discriminate PS. Univariate and multivariate analysis were conducted to identify the clinical characteristics and risk factors for PS. Specific reasons for patients with DS turned into PS were reviewed. ROC curve analysis defined PNI cutoff level of 45.85 corresponding to PS (area under the curve (AUC) = 0.71, 77% sensitivity, 56.9% specificity). Low PNI (OR = 3.23, P = 0.005), tumor crossingthe peritoneal reflection (PR) (OR = 3.42, P = 0.003), postoperative distant metastasis (OR = 6.31, P < 0.001) were independently associated with PS. Besides, anastomotic complications (31.4%), poor oncological outcomes (35.3%), and personal preferences (33.3%) were the specific reasons for patients turning into PS. Preoperative PNI is an independent prognostic factor to predict PS in patients who underwent anterior resection and DS. Therefore, combined with other clinical characteristics and predictors, preoperative measurements of PNI could provide a significant support for clinical decision on patients prepared to accept anterior resection and DS.