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(A and B) Thirty-day readmission rate (A) and 30-day mortality rate (B) at the hospital level after patients’ discharge from COPD hospitalization during periods of the HRRP from December 2006 to November 2017 in the United States. We excluded admissions in the year of 2012 (grayed-out area) owing to limitations in linking beneficiary identification. COPD = chronic obstructive pulmonary disease; HRRP = Hospital Readmissions Reduction Program.
