Tiotropium/olodaterol versus tiotropium in Japanese patients with COPD: results from the DYNAGITO study
Authors Ichinose M, Nishimura M, Akimoto M, Kurotori Y, Zhao Y, de la Hoz A, Mishima M
Received 2 April 2018
Accepted for publication 21 May 2018
Published 13 July 2018 Volume 2018:13 Pages 2147—2156
Checked for plagiarism Yes
Review by Single-blind
Peer reviewers approved by Dr Amy Norman
Peer reviewer comments 2
Editor who approved publication: Dr Richard Russell
Masakazu Ichinose,1 Masaharu Nishimura,2 Manabu Akimoto,3 Yasuhiro Kurotori,3 Yihua Zhao,4 Alberto de la Hoz,5 Michiaki Mishima6
1Department of Respiratory Medicine, Tohoku University Graduate School of Medicine, Sendai, Japan; 2Department of Pulmonary Medicine, Faculty School of Medicine, Hokkaido University, Sapporo, Japan; 3Nippon Boehringer Ingelheim Co. Ltd, Tokyo, Japan; 4Boehringer Ingelheim Pharmaceuticals, Inc., Ridgefield, CT, USA; 5Boehringer Ingelheim International GmbH, Ingelheim, Germany; 6Osaka Saiseikai Noe Hospital, Osaka, Japan
Background: The DYNAGITO study was a Phase IIIb, randomized, double-blind, multicenter, active-controlled, parallel-group, 52-week study designed to determine the efficacy and safety of tiotropium and olodaterol combination therapy (TIO+OLO 5/5 μg) versus tiotropium monotherapy (TIO 5 μg) for reducing moderate-to-severe exacerbations of COPD. This is a prespecified analysis of the DYNAGITO data in Japanese patients.
Patients and methods: Enrolled patients had a diagnosis of COPD with at least one moderate-to-severe exacerbation in the previous 12 months. Of the total 7,880 treated patients in the DYNAGITO study, 461 (TIO+OLO 5/5 μg: n=226, TIO 5 μg: n=235) were Japanese. The primary endpoint was the annualized rate of moderate-to-severe COPD exacerbations. The key secondary endpoint was the time to first moderate-to-severe COPD exacerbation, and other secondary endpoints included the annualized rate of exacerbations leading to hospitalization, time to first COPD exacerbation leading to hospitalization, and all-cause mortality. Safety data were analyzed descriptively.
Results: Combination therapy with TIO+OLO resulted in a 29% lower rate of moderate-to-severe COPD exacerbations relative to TIO monotherapy (rate ratio 0.71; 99% CI: 0.46, 1.10; p=0.0434). The risk of a first moderate-to-severe COPD exacerbation was 19% lower with TIO+OLO combination therapy than with TIO monotherapy (HR 0.81; 99% CI: 0.57, 1.17; p=0.1379), although this difference was not statistically significant. The annualized rate of COPD exacerbations requiring hospitalization was 14% lower in the TIO+OLO arm than in the TIO arm (rate ratio 0.86; 95% CI: 0.52, 1.42; p=0.5654). The adverse event incidence was balanced between treatment arms.
Conclusion: In a prespecified subgroup analysis of Japanese patients in the DYNAGITO study, combination therapy with TIO+OLO was more effective than TIO in reducing exacerbations. Both treatments were well tolerated.
Keywords: all-cause mortality, COPD, fixed-dose combination therapy, hospitalization, moderate-to-severe exacerbations, monotherapy
Corrigendum for this paper has been published
This work is published and licensed by Dove Medical Press Limited. The full terms of this license are available at https://www.dovepress.com/terms.php and incorporate the Creative Commons Attribution - Non Commercial (unported, v3.0) License. By accessing the work you hereby accept the Terms. Non-commercial uses of the work are permitted without any further permission from Dove Medical Press Limited, provided the work is properly attributed. For permission for commercial use of this work, please see paragraphs 4.2 and 5 of our Terms.Download Article [PDF] View Full Text [HTML][Machine readable]