Figure 1. Study Flow Diagram Describing Proportion of Hospitalized Patients With Chronic Obstructive Pulmonary Disease (COPD) Included in the Cross-sectional Analysis.

^aWe captured unique hospital admissions during the study time period. Readmissions from the same patient were not captured.

^bThe mean (SD) age of this group was 71.8 (9.9) years; 57 patients (53.8%) were women, 49 patients (46.2%) were men, and the median (IQR) Elixhauser Comorbidity Index score was 3 (3-8).