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Preoperative anemia, blood transfusion, and neutrophil-to-lymphocyte ratio in patients with stage i non-small cell lung cancer.
Perioperative and postoperative blood transfusions (BT), anemia and inflammation are associated with poor survivals in patients with non-small cell lung cancer (NSCLC). This study investigated the impact of perioperative BT on the survival of patients with NSCLC taking into account their preoperative inflammatory status and the presence of anemia. Demographic, perioperative, and survival data for 861 patients with stage I NSCLC was collected retrospectively. The primary endpoints of interest were recurrence-free (RFS) and overall survival (OS). Before and after propensity score matching, univariate and multivariable Cox proportional hazards models were used to evaluate the association between covariates and survival. A neutrophil-to-lymphocyte ratio (NLR) < 5 (hazard ratio [HR]: 0.58, 95% CI: 0.38-0.87; p = 0.009) and normal Hb concentration (HR: 0.72, 95% CI: 0.72; p = 0.022) were independently associated with longer RFS. The administration of blood perioperatively was associated with a trend towards worse RFS (HR: 0.69, 95% CI: 0.47-1.02; p = 0.066). The multivariate analysis also revealed that an NLR < 5 (HR: 0.48, 95% CI: 0.3-0.76; p = 0.001) and the absence of BT (HR: 0.63, 95% CI: 0.4-0.98; p = 0.04) were significantly associated with lower mortality risk. The propensity score matching analysis did not confirm the association between BT and poor RFS (HR: 0.63, 95% CI: 0.35-1.1; p = 0.108) and OS (HR: 0.52, 95% CI: 0.26-1.04; p = 0.06). Inflammation and anemia are common finding in patients with stage 1 NSCLC. After adjusting for these two important confounders, this study confirms that previous reports demonstrating an association between BT and poor survival after NSCLC surgery.
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