Outcomes at ≥ 4 weeks | Number of studies (n) | Standardised mean difference (95% CI) |
---|---|---|
*Meta-analyses were done using a fixed effects model. FEV1 = forced expiratory volume in 1 second. | ||
FEV1 | 7 (1404) | −0.14 (−0.25 to −0.03) |
Morning peak expiratory flow rate | 7 (1389) | −0.14 (−0.25 to −0.04) |
Use of additional relief drugs | 6 (967) | –0.18 (–0.31 to –0.05) |