Type of treatment | Number of trials | Follow-up | WMD (95% CI) |
---|---|---|---|
†WMD = weighted mean difference; other abbreviations defined in glossary. All analyses used a fixed-effects model. | |||
Single dose | 2 (n = 50) | {1 to 6 h}* | −2.05 (−6.05 to 1.96) |
Longer duration | 4 (n = 140) | 1 to 8 wk | −2.55 (−5.94 to 0.84) |