Q-PCR was used to detect the PARP1 expression of tissue samples of 75 NSCLC patients. (A) The PARP1 expression of Pearson correlation scatter diagram in the matching tissue of 75 NSCLC patients and serum samples. A high consistency was found in its expression of blood and tissue samples. (B) The expression of PARP1 in metastatic NSCLC was higher than that in the non-metastatic NSCLC tissue. The results were analyzed using t-test. *p < 0.05; **p < 0.01; ***p < 0.001. Red, metastatic group; blue, non-metastatic group.