CRP and lung cancer: These prognostic variables included age, BMI, hemoglobin (HGB), platelet (PLT), lymphocyte‐to‐monocyte ratio (LMR), CRP, CRP‐to‐albumin ratio (CAR), globulin (GLOB), albumin‐to‐globulin ratio (AGR), LDH, cystatin C (Cys‐C), advanced lung cancer inflammation index (ALI), and prognostic nutritional index (PNI).