Based on the IHC scores of each tumour tissue, patients with lung cancer were divided into Cx43‐high (H‐score > 23.85) and Cx43‐low (H‐score < 23.85) groups according to the median value of Cx43 expression, and the H‐scores of CD8 were compared between these two groups. Here, GJA1 is linked to neoplasm.