Stem cell factor (SCF) (OR = 1.150, 95% CI: 1.021–1.296, P = 0.021) and interleukin-1beta (IL-1β) (OR = 1.152, 95% CI: 1.003–1.325, P = 0.046) were positively associated with the risk of lung adenocarcinoma (Figures 3A, B) (Supplementary Table S4). Here, KITLG is linked to lung adenocarcinoma.