NQO1 and lung carcinoma: To further substantiate the importance of NQO1 expression in NSCLC progression, we analyzed the relationships between NQO1 positive expression rate and DFS and OS in 150 lung cancer cases using the Kaplan-Meier method, and found that patients with NQO1 positive expression had lower DFS (Log-rank = 13.899, P < 0.001) and OS (Log-rank = 10.146, P = 0.001) rates than those with NQO1 negative expression (Figure 3A & B).