Effects of preoperative blood platelet-to-lymphocyte ratio on prognosis of non-small cell lung cancer patients after surgical resection / 中国肿瘤临床

ABSTRACT

Objective:To investigate the correlation between preoperative blood platelet-to-lymphocyte ratio (PLR) and clinico-pathological features, as well as the effect of PLR on the prognosis of non-small cell lung cancer (NSCLC) patients after surgical resec-tion. Methods:Retrospective analysis was performed for 255 cases with histologically confirmed NSCLC that underwent curative re-section from January 2004 to December 2007. All patients were classified into two groups based on the median value of PLR. The rela-tionship between PLR and clinicopathological features was studied. Univariate and multivariate analyses were performed to assess the prognostic effect of preoperative PLR. Results:The median value of preoperative PLR was 130 (range45.45 to 272.66). Based on the cut-off value of 130, all patients were divided into two groupslow PLR (≤130, n=127) and high PLR (>130, n=128). PLR was corre-lated with tumor site, T stage, and clinical stage. Five-year survival rates of low and high PLR patients were 49.6%and 33.6%, respec-tively, which indicated a statistically significant difference (χ2=12.577, P<0.001) between the two groups. Univariate analysis showed that smoking status, histological differentiation, clinical stage, T stage, N stage, postoperative adjuvant therapy and PLR were associat-ed with survival (P<0.05 for all). Multivariate analysis identified N stage, postoperative adjuvant therapy, and PLR as independent prog-nostic factors of all the patients. In addition, stratified analysis showed that the five-year survival rate of the low PLR group was higher than that of the high PLR group with or without lymph node metastasis, and the differences were statistically significant (P=0.020 and 0.037). Conclusion:An elevated blood preoperative PLR indicates poor prognosis in NSCLC patients. Preoperative PLR is an indepen-dent prognostic factor of NSCLC after curative resection.