Differential Response to 12 Weeks of Once-Daily Tiotropium/Olodaterol Fixed Dose Combination in Patients with COPD: A Multidimensional Response Profiling in the TORRACTO Study

Abstract

Rein Posthuma,1– 3 Lowie EGW Vanfleteren,4,5 Swetlana Gaffron,6 Anouk W Vaes,1 Frits ME Franssen,1– 3 Martijn A Spruit1– 3 1Department of Research and Development, CIRO+, Center of Expertise for Chronic Organ Failure, Horn, the Netherlands; 2NUTRIM, School of Nutrition and Translational Research in Metabolism, Faculty of Health, Medicine and Life Sciences, Maastricht, the Netherlands; 3Department of Respiratory Medicine, Maastricht University Medical Center (MUMC+), Maastricht, the Netherlands; 4COPD Center, Department of Respiratory Medicine and Allergology, Sahlgrenska University Hospital, Gothenburg, Sweden; 5Department of Internal Medicine and Clinical Nutrition, Institute of Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden; 6Viscovery Software GmbH, Vienna, AustriaCorrespondence: Rein Posthuma, CIRO+, Center of expertise for chronic organ failure, Hornerheide 1, Horn, 6085 NM, the Netherlands, Email [email protected]: Long-acting bronchodilators (LABD), in general, reduce respiratory symptoms, improve exercise endurance time and pulmonary function in patients with chronic obstructive pulmonary disease (COPD). However, there might be heterogeneity in improvement for several outcomes on an individual level. Therefore, we aimed to profile the multidimensional response in patients receiving tiotropium/olodaterol (T/O) using self-organizing maps (SOM).Materials and Methods: This is a secondary analysis of the TORRACTO study: a multicenter, multinational, randomized, double-blind, placebo-controlled, parallel-group trial to evaluate the effects of T/O (2.5/5 and 5/5 μg) compared with placebo after 6 and 12 weeks of treatment in patients with COPD. In the current study, we used endurance time, forced expiratory volume in 1 s (FEV1), forced vital capacity (FVC), inspiratory capacity (IC) at rest and IC at isotime (ICiso) to identify clusters by means of SOM in patients treated with T/O.Results: Six clusters with distinct response profiles were generated at week 12 in COPD patients receiving T/O (n = 268). Patients in cluster 1 improved significantly on all outcomes, whilst cluster 5 showed strong improvement in endurance time (357s); contrarily, FEV1, FVC, ICrest and ICiso decreased when compared to baseline.Conclusion: Individual responses on endurance time and pulmonary function after 12 weeks of T/O are heterogeneous. This study identified clusters in COPD patients with markedly different multidimensional response on LABD.Keywords: COPD, long-acting bronchodilators, outcomes

Keywords

• copd
• long-acting bronchodilators
• outcomes