Oral Haemophilus influenzae vaccination v placebo for recurrent bronchitis*
| Weighted event rates | |||||
|---|---|---|---|---|---|
| Outcomes | Follow up | Vaccine | Placebo | RRR (95% CI) | NNT (CI) |
| Antibiotic use | 6 months | 32% | 59% | 46% (13 to 66) | 4 (3 to 12) |
| Weighted mean decrease (CI) | ||||
|---|---|---|---|---|
| *Fixed-effects model used for all outcomes. Abbreviations defined in glossary; NNT and CI calculated from data in article. | ||||
| Bronchitis episodes | 3 months | 6.69 (6.42 to 6.96) | ||
| 6 months | 4.47 (4.30 to 4.64) | |||