Purpose: A high plasma level of either fibrinogen or D-dimer has been shown to correlate with a poor prognosis in patients with surgically resected non-small-cell lung cancer (NSCLC). The present study aimed to identify whether or not both markers combined had a superior prognostic value to either alone.
Methods: Of the 1344 patients who underwent surgical resection for NSCLC at our institution between January 2007 and December 2016, 1065 had preoperative plasma fibrinogen and D-dimer data available and were included in the analysis.
Results: The recurrence-free survival (RFS) and overall survival (OS) rates were similar for patients with high plasma levels of either or both fibrinogen (> 4.0 g/L) or D-dimer (> 1.0 μg/mL); therefore, these three groups were combined for a further analysis into a single group with high plasma levels of either or both proteins. The high-level group had significantly lower 5-year RFS (53% vs. 68%, p < 0.001) and 5-year OS (65% vs. 80%, p < 0.001) rates than patients with normal plasma levels of fibrinogen and D-dimer (control group).
Conclusions: Our results suggest that preoperative tests for both plasma fibrinogen and D-dimer are necessary to identify patients with surgically resected NSCLC likely to have a poor RFS and OS.
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