Objective: To assess the value of using the prognostic nutritional index (PNI) and serum albumin/globulin ratio (AGR) in predicting the overall survival (OS) of patients with penile cancer (PC) undergoing penectomy. Materials and methods: A retrospective analysis of 123 patients who were admitted to our hospital due to PC from April 2010 to September 2021 and underwent penectomy were included in the study. The optimal cut-off value of PNI and AGR was determined by receiver operating characteristic curve analysis. Kaplan-Meier analysis and the Cox proportional hazard model were used to evaluate the correlation between PNI, AGR, and OS in patients with PC. Results: The best cut-off values of PNI and AGR were set to 49.03 (95% confidence interval 0.705-0.888, Youden index=0.517, sensitivity=57.9%, specificity=93.7%, P<0.001) and 1.28 (95% confidence interval 0.610-0.860, Youden index=0.404, sensitivity=84.1%, specificity=56.2%, P=0.003). Kaplan-Meier analysis showed that the OS of the patients in the high PNI group and the high AGR group was significantly higher than that of the patients in the low PNI group and the low AGR group (P<0.001). Univariate analysis showed that patient age, clinical N stage, pathological stage, PNI, and SII are all predictors of OS in patients with PC (P<0.05). Multivariate analysis showed that pathological stage (P=0.005), PNI (P=0.021), and AGR (P=0.004) are independent prognostic factors for predicting OS in patients with PC undergoing penectomy. Conclusions: Both PNI score and serum AGR are independent prognostic factors for predicting OS in patients with PC undergoing penectomy.
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