Figure 3From: Risk factors of postoperative recurrences in patients with clinical stage I NSCLCThe relationship of DFS and CEA level in clinical stage I NSCLC. The CEA level can predict DFS after operation (the blue line: CEA <3.5 ng/mL; the green line: CEA >3.5 ng/mL; P <0.001). CEA, carcinoembryonic antigen; cum, cumulative; DFS, disease-free survival.Back to article page