LAUSR

• Patients were identified with either the Aerobika* (Trudell Medical International) or Acapella† (Smiths Medical) OPEP devices from September 2013 to April 2018 in IQVIA’s hospital claims data linked to medical (Dx) and prescription claims (LRx); the first COPD/chronic bronchitis hospital visit with an OPEP device was index. • Patients were ≥18 years old, had ≥1 hospital, LRx, and Dx record within 12 months before and after index, and had no asthma diagnosis before index or post-operative OPEP device use within 30 days before index. Kaplan-Meier survival analysis was used to compare time from discharge to disease-related readmission, and readmission rates were also determined at 30 days and 12 months post-discharge for 1:3 propensity score (PS)-matched Aerobika• and Acapella users.