Characterization of Patients with Chronic Obstructive Pulmonary Disease Initiating Single-Inhaler Long-Acting Muscarinic Antagonist/Long-Acting β2-Agonist Dual Therapy in a Primary Care Setting in England

Gema Requena,1 Victoria Banks,2 Alexandrosz Czira,1 Robert Wood,2 Theo Tritton,2 Rosie Wild,2 Chris Compton,1 Maria Duarte,1 Afisi S Ismaila3,4 1Value Evidence and Outcomes, Epidemiology, GSK, R&D Global Medical, Brentford, Middlesex, UK; 2Real-world Evidence, Adelphi Real World, Bollington, Cheshire, UK; 3Value Evidence and Outcomes, GSK, Collegeville, PA, USA; 4Department of Health Research Methods, Evidence and Impact, McMaster University, Hamilton, ON, CanadaCorrespondence: Gema Requena, Epidemiology, Value Evidence and Outcomes, R&D Global Medical, GSK, Brentford, Middlesex, UK, Tel +44 20 80476893, Email gema.x.requena@gsk.comPurpose: Treatment pathways of patients with chronic obstructive pulmonary disease (COPD) receiving single-inhaler dual therapies remain unclear. We aimed to describe characteristics, prescribed treatments, healthcare resource use (HCRU) and costs of patients with COPD who initiated single-inhaler long-acting muscarinic antagonist/long-acting β2-agonist (LAMA/LABA) dual therapy in primary care in England.Patients and Methods: Retrospective study using linked data from Clinical Practice Research Datalink Aurum and Hospital Episode Statistics datasets. Patients with COPD with ≥ 1 single-inhaler LAMA/LABA prescription between June 2015 and December 2018 (index) were included. Demographic and clinical characteristics, prescribed treatments, HCRU and costs were evaluated in the 12 months pre-index. Data are presented for patients not receiving concomitant inhaled corticosteroids at index (non-triple users).Results: Of 10,991 patients initiating LAMA/LABA, 9888 were non-triple users, of whom 21.3% (n=2109) received aclidinium bromide/formoterol, 18.1% (n=1785) received indacaterol/glycopyrronium, 12.0% (n=1189) received tiotropium bromide/olodaterol and 48.6% (n=4805) received umeclidinium/vilanterol. Demographic and clinical characteristics were similar across indexed therapies. LAMA monotherapy was the most frequently prescribed respiratory therapy at 12 (18.4– 25.8% of patients) and 3 months (23.9– 33.7% of patients) pre-index across indexed therapies; 42.5– 59.0% of patients were prescribed no respiratory therapy at these time points. COPD-related HCRU during the 12 months pre-index was similar across indexed therapies (general practitioner consultations: 62.0– 68.6% patients; inpatient stays: 19.3– 26.1% patients). Pre-index COPD-related costs were similar across indexed therapies, with inpatient stays representing the highest contribution. Mean total direct annual COPD-related costs ranged from £ 805–£ 1187.Conclusion: Characteristics of patients newly initiating single-inhaler LAMA/LABA dual therapy were highly consistent across indexed therapies. As half of non-triple users were not receiving respiratory therapy one year prior to LAMA/LABA initiation, there may be an opportunity for early optimization of treatment to relieve clinical burden versus current prescribing patterns in primary care in England.Keywords: COPD, initial maintenance therapy, primary care setting, patient characteristics, single-inhaler LAMA/LABA dual therapy, treatment patterns