In regarding to DFS, as shown in Supplementary Table S9, tumor depth (HR = 2.286, 95% CI: 1.469–3.558, P < 0.001) and lymph node metastasis (HR = 1.862, 95% CI: 1.317–2.631, P < 0.001) could also serve as the independent prognostic factors, but STING expression failed to be of independent prognostic significance for the DFS of LUAD patients among the variables examined (HR = 0.693, 95% CI: 0.467–1.028, P = 0.069). This evidence concerns the gene STING1 and metastatic malignant neoplasm in the lymph nodes.