Baseline Neutrophil-to-Lymphocyte Ratio and Longitudinal Lung Function Decline in Chronic Obstructive Pulmonary Disease: A Retrospective Cohort Study
Background Systemic inflammation may contribute to heterogeneous lung function trajectories in chronic obstructive pulmonary disease (COPD), but evidence linking the neutrophil-to-lymphocyte ratio (NLR) to longitudinal forced expiratory volume in one second (FEV1) change is limited. Methods We analyzed repeated spirome...