CRP and chronic obstructive pulmonary disease: IQR, interquartile range; CAD, coronary artery disease; COPD, chronic obstructive pulmonary disease; OSA, obstructive sleep apnea; HTN, hypertension; DM, diabetes mellitus; CRP, C-reactive protein; LDH, lactate hydrogenase; FEU, fibrinogen equivalent units; TCZ, tocilizumab.