Fig. 3

Box plot and Kaplan‒Meier survival curve of lung cancer patients whose nAChR expression was analyzed via the GEPIA 2 database. A Differences in CHRNA5 expression between cancer tissues and normal tissues in LUAD. B Differences in CHRNA5 expression between cancer tissues and normal tissues in LUSC. C Differences in the expression of CHRNB4 between cancer tissues and adjacent normal tissues in LUSC. D Survival curves of the high- and low-CHRNA5 expression groups in LUAD. E Survival curves of the high- and low-CHRNA5 expression groups in LUSC. F Survival curves of the high- and low-CHRNB4 expression groups in LUSC