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BioMed Research International
Volume 2013 (2013), Article ID 231979, 10 pages
http://dx.doi.org/10.1155/2013/231979
Review Article

Probiotics as Additives on Therapy in Allergic Airway Diseases: A Systematic Review of Benefits and Risks

1Department of Pediatrics, All India Institute of Medical Sciences, Bhubaneswar 751019, India
2Department of Obstetrics & Gynecology, SCB Medical College, Cuttack 753007, India
3Department of Pediatrics, Postgraduate Institute of Medical Education and Research, Chandigarh 160012, India

Received 4 April 2013; Accepted 19 June 2013

Academic Editor: Enrico Compalati

Copyright © 2013 Rashmi Ranjan Das et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Background. We conducted a systematic review to find out the role of probiotics in treatment of allergic airway diseases.  Methods. A comprehensive search of the major electronic databases was done till March 2013. Trials comparing the effect of probiotics versus placebo were included. A predefined set of outcome measures were assessed. Continuous data were expressed as standardized mean difference with 95% CI. Dichotomous data were expressed as odds ratio with 95% CI. P value < 0.05 was considered as significant. Results. A total of 12 studies were included. Probiotic intake was associated with a significantly improved quality of life score in patients with allergic rhinitis (SMD −1.9 (95% CI −3.62, −0.19); P = 0.03), though there was a high degree of heterogeneity. No improvement in quality of life score was noted in asthmatics. Probiotic intake also improved the following parameters: longer time free from episodes of asthma and rhinitis and decrease in the number of episodes of rhinitis per year. Adverse events were not significant. Conclusion. As the current evidence was generated from few trials with high degree of heterogeneity, routine use of probiotics as an additive on therapy in subjects with allergic airway diseases cannot be recommended.