alexa Meta-analysis: effect of long-acting beta-agonists on severe asthma exacerbations and asthma-related deaths.
Psychiatry

Psychiatry

Journal of Addiction Research & Therapy

Author(s): Salpeter SR, Buckley NS, Ormiston TM, Salpeter EE

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Abstract BACKGROUND: Long-acting beta-agonists may increase the risk for fatal and nonfatal asthma exacerbations. PURPOSE: To assess the risk for severe, life-threatening, or fatal asthma exacerbations associated with long-acting beta-agonists. DATA SOURCES: English- and non-English-language searches of MEDLINE, EMBASE, and Cochrane databases; the U.S. Food and Drug Administration Web site; and references of selected reviews through December 2005. STUDY SELECTION: Randomized, placebo-controlled trials that lasted at least 3 months and evaluated long-acting beta-agonist use in patients with asthma. All trials allowed the use of as-needed short-acting beta-agonists. DATA EXTRACTION: Outcomes measured were Peto odds ratio (OR) and risk difference of severe exacerbations requiring hospitalization, life-threatening exacerbations requiring intubation and ventilation, and asthma-related deaths. The OR for asthma-related deaths was obtained from the Salmeterol Multi-center Asthma Research Trial (SMART). DATA SYNTHESIS: Pooled results from 19 trials with 33 826 participants found that long-acting beta-agonists increased exacerbations requiring hospitalization (OR, 2.6 [95\% CI, 1.6 to 4.3]) and life-threatening exacerbations (OR, 1.8 [CI, 1.1 to 2.9]) compared with placebo. Hospitalizations were statistically significantly increased with salmeterol (OR, 1.7 [CI, 1.1 to 2.7]) and formoterol (OR, 3.2 [CI, 1.7 to 6.0]) and in children (OR, 3.9 [CI, 1.7 to 8.8]) and adults (OR, 2.0 [CI, 1.1 to 3.9]). The absolute increase in hospitalization was 0.7\% (CI, 0.1\% to 1.3\%) over 6 months. The risk for asthma-related deaths was increased (OR, 3.5 [CI, 1.3 to 9.3]), with a pooled risk difference of 0.07\% (CI, 0.01\% to 0.1\%). LIMITATIONS: The small number of deaths limited the reliability in assessing this risk, and 28 studies did not report information on the outcomes of interest. CONCLUSIONS: Long-acting beta-agonists have been shown to increase severe and life-threatening asthma exacerbations, as well as asthma-related deaths.
This article was published in Ann Intern Med and referenced in Journal of Addiction Research & Therapy

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