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Inhaled sodium cromoglycate for asthma in children.

Abstract：

BACKGROUND:Sodium cromoglycate has been recommended as maintenance treatment for childhood asthma for many years. Its use has decreased since 1990, when inhaled corticosteroids became popular, but it is still used in many countries. OBJECTIVES:To determine the efficacy of sodium cromoglycate compared to placebo in the prophylactic treatment of children with asthma. SEARCH STRATEGY:We searched the Cochrane Airways Group Trials Register (October 2007), the Cochrane Central Register of Controlled Trials (CENTRAL) (The Cochrane Library Issue 3, 2007), MEDLINE (January 1966 to November 2007), EMBASE (January 1985 to November 2007) and reference lists of articles. We also contacted the pharmaceutical company manufacturing sodium cromoglycate. In 2007 we updated the review. SELECTION CRITERIA:All double-blind, placebo-controlled randomised trials, which addressed the effectiveness of inhaled sodium cromoglycate as maintenance therapy, studying children aged 0 up to 18 years with asthma. DATA COLLECTION AND ANALYSIS:Two authors independently assessed trial quality and extracted data. We pooled study results. MAIN RESULTS:Of 3500 titles retrieved from the literature, 24 papers reporting on 23 studies could be included in the review. The studies were published between 1970 and 1997 and together included 1026 participants. Most were cross-over studies. Few studies provided sufficient information to judge the concealment of allocation. Four studies provided results for the percentage of symptom-free days. Pooling the results did not reveal a statistically significant difference between sodium cromoglycate and placebo. For the other pooled outcomes, most of the symptom-related outcomes and bronchodilator use showed statistically significant results, but treatment effects were small. Considering the confidence intervals of the outcome measures, a clinically relevant effect of sodium cromoglycate cannot be excluded. The funnel plot showed an under-representation of small studies with negative results, suggesting publication bias. AUTHORS' CONCLUSIONS:There is insufficient evidence to be sure about the efficacy of sodium cromoglycate over placebo. Publication bias is likely to have overestimated the beneficial effects of sodium cromoglycate as maintenance therapy in childhood asthma.

journal_name

Cochrane Database Syst Rev

journal_title

The Cochrane database of systematic reviews

authors

van der Wouden JC,Uijen JH,Bernsen RM,Tasche MJ,de Jongste JC,Ducharme F

doi

10.1002/14651858.CD002173.pub2

subject

Has Abstract

pub_date

2008-10-08 00:00:00

pages

CD002173

issue

issn

1469-493X

pub_type

杂志文章,meta分析,评审

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Inhaled sodium cromoglycate for asthma in children.