Oral or parenteral and nebulised opioids v placebo for subjective assessment of dyspnoea*
| Trial in meta-analysis | Number of trials | Standardised mean difference (95% CI) |
|---|---|---|
| *All trials were crossover trials. Follow up not reported. CI defined in glossary. A random effects model was used. | ||
| †Not significant. | ||
| All trials | 12 | −0.31 (−0.50 to −0.13) |
| Oral or parenteral opioids | 9 | −0.40 (−0.63 to −0.17) |
| Nebulised opioids | 3 | −0.11 (−0.32 to 0.10)† |
