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Role of Tiotropium in Reducing Exacerbations of Chronic Obstructive Pulmonary Disease When Combined With Long-Acting β2-Agonists and Inhaled Corticosteroids: The OUTPUL Study.
- Source :
- Journal of Clinical Pharmacology; Nov2016, Vol. 56 Issue 11, p1423-1432, 10p
- Publication Year :
- 2016
-
Abstract
- Combined inhaled therapy in chronic obstructive pulmonary disease (COPD) is commonly used, but its benefits remain controversial. We assessed the effect of tiotropium in reducing COPD exacerbations when combined with long-acting β<subscript>2</subscript> agonists (LABA) and/or inhaled corticosteroids (ICS). This new-user cohort study is based on administrative data from 3 Italian regions. We identified adults hospitalized for COPD from 2006 to 2009 who were newly prescribed a fixed LABA/ICS combination (double therapy). We classified patients according to whether tiotropium was also prescribed (triple therapy), using both intention-to-treat and as-treated approaches, and followed them for 1 year. COPD exacerbations were measured as outcomes. Multivariate and propensity score-adjusted hazard ratios (HRs, 95%CI) were calculated with Cox regression models. We identified 5717 new users of LABA/ICS of which 31.9% initiated triple therapy. In the intention-to-treat analysis, the multivariate adjusted HR for moderate, severe, and any exacerbations were 1.02 (95%CI 0.89-1.16), 0.92 (95%CI 0.76-1.12), and 1.08 (95%CI 0.91-1.28), respectively. The propensity score adjustment produced similar results. In the subcohort of patients with previous exacerbations, triple therapy was significantly associated with reduced risk of moderate exacerbations, compared to double therapy (HR 0.68, 95%CI 0.48-0.98 in intention-to-treat approach). In conclusion, the addition of tiotropium to LABA/ICS did not reduce COPD exacerbations compared to LABA/ICS alone. A protective role for moderate exacerbations was found in patients at risk of frequent exacerbations. Given the impact of exacerbations on health status and prognosis, it is crucial to target COPD patients for optimal treatment. [ABSTRACT FROM AUTHOR]
- Subjects :
- ADRENERGIC beta agonists
CORTICOSTEROIDS
HORMONE therapy
PARASYMPATHOMIMETIC agents
DISEASE exacerbation
COMBINATION drug therapy
CONFIDENCE intervals
LONGITUDINAL method
OBSTRUCTIVE lung diseases
MULTIVARIATE analysis
REGRESSION analysis
TREATMENT effectiveness
PROPORTIONAL hazards models
DESCRIPTIVE statistics
INHALATION administration
PREVENTION
THERAPEUTICS
Subjects
Details
- Language :
- English
- ISSN :
- 00912700
- Volume :
- 56
- Issue :
- 11
- Database :
- Complementary Index
- Journal :
- Journal of Clinical Pharmacology
- Publication Type :
- Academic Journal
- Accession number :
- 118584447
- Full Text :
- https://doi.org/10.1002/jcph.750