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Review
. 2018 May 2;27(148):180010.
doi: 10.1183/16000617.0010-2018. Print 2018 Jun 30.

Efficacy and safety profile of xanthines in COPD: a network meta-analysis

Affiliations
Review

Efficacy and safety profile of xanthines in COPD: a network meta-analysis

Mario Cazzola et al. Eur Respir Rev. .

Abstract

Theophylline can still have a role in the management of stable chronic obstructive pulmonary disease (COPD), but its use remains controversial, mainly due to its narrow therapeutic window. Doxofylline, another xanthine, is an effective bronchodilator and displays a better safety profile than theophylline. Therefore, we performed a quantitative synthesis to compare the efficacy and safety profile of different xanthines in COPD.The primary end-point of this meta-analysis was the impact of xanthines on lung function. In addition, we assessed the risk of adverse events by normalising data on safety as a function of person-weeks. Data obtained from 998 COPD patients were selected from 14 studies and meta-analysed using a network approach.The combined surface under the cumulative ranking curve (SUCRA) analysis of efficacy (change from baseline in forced expiratory volume in 1 s) and safety (risk of adverse events) showed that doxofylline was superior to aminophylline (comparable efficacy and significantly better safety), bamiphylline (significantly better efficacy and comparable safety), and theophylline (comparable efficacy and significantly better safety).Considering the overall efficacy/safety profile of the investigated agents, the results of this quantitative synthesis suggest that doxofylline seems to be the best xanthine for the treatment of COPD.

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Conflict of interest statement

Conflict of interest: M. Cazzola reports personal fees from ABC Farmaceutici, outside the submitted work, and received personal fees to perform the meta-analysis and write the article. Conflict of interest: L. Calzetta reports personal fees from ABC Farmaceutici, during the conduct of the study, and received personal fees to perform the meta-analysis and write the article. Conflict of interest: M.G. Matera reports personal fees from ABC Farmaceutici, outside the submitted work. She is also a consultant at ABC Farmaceutici and was supported to write the article.

Figures

FIGURE 1
FIGURE 1
Impact of xanthines on change from baselines in a) forced expiratory volume in 1 s (FEV1) and b) the risk of adverse events. RE: relative effect; CrI: credible interval. ***: p<0.001 versus comparators.
FIGURE 2
FIGURE 2
Summary findings regarding the efficacy/safety profile across xanthines in chronic obstructive pulmonary disease patients. a) Combined plot of the change from baseline in forced expiratory volume in 1 s (FEV1) and the risk of adverse events (AEs) of specific xanthine comparisons. b) Combined efficacy/safety SUCRA (surface under the cumulative ranking curve) analysis of specific xanthines. RE: relative effect; CrI: credible interval.

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