Antibiotics v placebo for outcomes of acute bronchitis measured by ≥4 trials
| Outcomes | Number of trials | Weighted mean decrease (95% CI) |
|---|---|---|
| *Significant when pooled in units of standard deviation, but not significant in units of days. | ||
| †Heterogeneity existed among these studies. Results were not significant. | ||
| Days of purulent sputum | 6 | 0.4 d (−0.1 to 0.8)* |
| Days of cough | 4 | 0.5 d (−0.1 to 1.1)† |
| Days off work | 6 | 0.3 d (−0.6 to 1.1)† |