Fig. 1From: Clinical utility of blood neutrophil-lymphocyte ratio in Japanese COPD patientsProcess of patient selection in this study. Data from only those COPD patients with spirometrically confirmed COPD (FEV1/forced vital capacity (FVC) < 0.7) who had undergone at least 3 blood examinations over 3 years and were not receiving any oral steroid treatments (n = 274) were analyzed. COPD, chronic obstructive pulmonary diseaseBack to article page