However, factors such as ethnicity, smoking history, alcohol consumption, hypertension, diabetes, family history of lung cancer, disease stage, EGFR mutation type, and EGFR-TKI drug type were not associated with OS of patients after EGFR-TKI treatment, not statistically significant (P>0.05, Figure 4D–F, H), Table 2. Here, EGFR is linked to lung cancer.