Predictive Value of Plasma D-dimer Levels in Patients with Advanced Non-small-cell Lung Cancer
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Purpose: The relationship between plasma D-dimer level and the prognosis of advanced non-small-cell lung cancer (NSCLC) is not well studied. This study investigated the role of plasma D-dimer as a prognostic factor in advanced NSCLC.
Methods: The plasma D-dimer was measured in 1,931 newly diagnosed advanced NSCLC patients by enzyme-linked immunosorbent assay. Correlations between plasma D-dimer levels and other clinical parameters were analyzed. Survival curves were plotted using the Kaplan-Meier method. The Cox proportional hazard model was used for multivariate analysis.
Results: Plasma D-dimer concentrations were within the normal range in 1,393 patients (72.1%) and elevated in 538 patients (27.9%). The median overall survival was 11.5 and 8.8 months in the normal and high plasma D-dimer group, respectively (P<0.001). The progression-free survival of first-line chemotherapy was 5.0 months and 4.4 months in the groups with normal and high levels of plasma D-dimer, respectively, (P<0.001). By multivariate analyses, the elevated plasma D-dimer level was found to be an independent prognostic factor for poor survival (hazard ratio =1.245; P<0.001).
Conclusion: Plasma D-dimer is an independent determinant of poor prognosis in advanced NSCLC.
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