EGFR and metastatic malignant neoplasm in the lymph nodes: SGLT1 expression was associated with gender and age, but not smoking behavior, EGFR mutation status, tumor size, lymph node metastasis, pathological stage, or immediate response to EGFR TKIs, with higher SGLT1 expression, detected in NSCLC tumors of males aged over 55 years (Supplementary Table S1 and Supplementary Fig. S6d, e).