|Time point||No of studies||Weighted event rates||RBI (95% CI)||NNT (CI)|
|*Abbreviations defined in glossary; RBI, NNT, and CI calculated from data in article.|
|6 hours||13||56%||41%||37% (6 to 56)||7 (4 to 50)|
|12 hours||7||89%||68%||31% (16 to 43)||5 (3 to 11)|
|24 hours||5||95%||83%||14% (4 to 24)||8 (5 to 33)|
Review: glucocorticoids improve symptoms of croup within 6 hours
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