LDOC1 and lung cancer: The representative images of IHC, which indicated that LDOC1 protein expression was negatively correlated with clinical stages of lung cancer, are shown in Figure 2C. Kaplan–Meier analysis demonstrated that patients with stage IV lung cancer expressing low LDOC1 protein levels had a significantly shorter (p = 0.004, log-rank test) OS (mean 351 ± 79 days) than patients expressing high LDOC1 protein levels (mean 742 ± 115 days) (Figure 2D).