EGFR and diabetes mellitus: Previous research on operable NSCLC showed that elderly patients, males, smokers, patients with cardiovascular comorbidities and squamous cell carcinomas had a greater chance of DM, which is consistent with our findings that DM patients with high HbA1c levels were more likely to be males, elder, smokers, having greater BMI, CVD, non-adenocarcinoma, and wildtype EGFR (34).