Impact of tiotropium + olodaterol on physical functioning in COPD: Results of an open-label observational study

Abstract

Background: Maintaining and improving physical functioning is key to mitigating the cycle of deconditioning associated with chronic obstructive pulmonary disease (COPD). We evaluated the impact of free combination of the long-acting anticholinergic tiotropium plus the long-acting β2-agonist olodaterol on physical functioning in a real-world clinical setting. Methods: In this open-label noninterventional study, Global initiative for chronic Obstructive Lung Disease (GOLD) B-D patients with COPD aged ≥40 years were treated for 4-6 weeks with either tiotropium 5 μg + olodaterol 5 μg (both via Respimat® inhaler) or tiotropium 18 μg (HandiHaler®) + olodaterol 5 μg (Respimat®) once daily. Physical functioning was assessed by the self-reported 10-item Physical Functioning Questionnaire (PF-10). The primary end point was the percentage of patients achieving therapeutic success, defined as a 10-point increase in the PF-10 between baseline (visit 1) and weeks 4-6 (visit 2). Secondary end points included absolute PF-10 scores, Physicians’ Global Evaluation, satisfaction with Respimat® and adverse events. Results: A total of 1,858 patients were treated: 1,298 (69.9%) with tiotropium 5 μg + olodaterol 5 μg and 560 (30.1%) with tiotropium 18 μg + olodaterol 5 μg. At study end, 1,683 (92.6%) and 1,556 patients (85.6%) continued using tiotropium and olodaterol, respectively; 48.9% (95% confidence interval: 46.5, 51.3) achieved the primary end point. Therapeutic success rates were significantly higher for maintenance-naïve patients compared to those who had received prior therapy (59.1% vs 44.5%; P<0.0001), largely driven by maintenance-treatment-naïve GOLD B (59.8%) and C (63.0%) patients. Absolute physical functioning scores increased from an average baseline of 44.0 (standard deviation: 25.2) to 54.2 (standard deviation: 26.9) at visit 2. Patients’ general condition improved from baseline to visit 2, and patients were largely satisfied with the Respimat® inhaler. Adverse events were reported by 7.5% of patients; the most common were respiratory in nature. Conclusion: Tiotropium + olodaterol improved physical functioning within 4-6 weeks in patients with moderate-to-very severe COPD. GOLD B and C patients with no prior maintenance treatment demonstrated the greatest benefit.