Preoperative platelet-to-lymphocyte ratio is a valuable prognostic biomarker in patients with hepatocellular carcinoma undergoing curative liver resection

The Platelet to lymphocyte ratio (PLR) has been reported to predict prognosis of patients with hepatocellular carcinoma (HCC). This study examined the prognostic potential of stratified PLR for HCC patients undergoing curative liver resection. Medical records were retrospectively analyzed for 778 HCC patients undergoing curative liver resection at the Affiliated Tumor Hospital of Guangxi Medical University and the First People's Hospital of Changde between April 2010 and October 2013. Patients were stratified based on quintile analysis of their preoperative PLR, and patients in different quintiles were analyzed for overall survival (OS) and disease-free survival (DFS) using Kaplan-Meier analysis. Independent predictors of death or recurrence were explored using multivariable Cox proportional hazard regression. Higher PLR quintiles were significantly associated with poorer overall survival (p < 0.001). Multivariate analysis showed PLR to be an independent risk factor for OS (p = 0.003). Patients in PLR quintile 5 had lower overall survival than in quintile 1 (hazard ratio (HR) = 2.780, 95% confidence interval (CI): 1.769-4.367, p < 0.001). Although patients in PLR quintile 5 had significantly lower disease-free survival (DFS) than in quintile 1 (HR = 1.534, 95% CI: 1.112-2.117, p = 0.009), this association was not significant after multivariable adjustment (p = 0.220). Subgroup analysis also showed that PLR quintiles were significantly associated with poor OS in patients positive for HBsAg or with cirrhosis (both p < 0.001). Similar results were obtained when PLR was analyzed as a dichotomous variable with cut-off values of 110 and 115. Elevated preoperative PLR may be independently associated with poor OS and DFS in HCC patients following curative resection.