CRP and chronic obstructive pulmonary disease: The independent variables are lymphocyte count, monocyte count, lymphocyte–monocyte ratio (LMR), neutrophil–lymphocyte ratio (NLR), CRP–lymphocyte ratio (CLR), CRP, presence of nodules or masses, symptoms such as cough, sputum, and dyspnea, duration of immune checkpoint inhibitor use, COPD, smoking, and lung cancer.