Short term coseasonal sublingual immunotherapy and standard symptomatic treatment (active) v standard symptomatic treatment alone (control) in children with hay fever*
| Outcome at 3 years | Active | Control | RRR (95% CI) | NNT (CI) |
|---|---|---|---|---|
| *Abbreviations defined in glossary; RRR, NNT, and CI calculated from data in article. | ||||
| Development of asthma | 17% | 37% | 55% (9 to 78) | 5 (3 to 42) |