Outcomes | Number of trials | Comparisons | Weighted mean difference out of 100 (95% CI)† | ||
---|---|---|---|---|---|
*Abbreviations defined in glossary; RBI, RRR, NNT, and CI calculated from data in article using a random effects model. All significant differences favour decision aids over usual care or detailed over simple decision aids. | |||||
†Scale for knowedge ranged from 0 (no correct responses) to 100 (all accurate responses) and scale for conflict ranged from 0 (no decisional conflict) to 100 (extreme decisional conflict). | |||||
Knowledge | 9 | DA v UC | 19 (13 to 24) | ||
9 | DDA v SDA | 4.4 (2.5 to 6.2) | |||
Decisional conflict | 6 | DA v UC | −5.8 (–8.6 to −2.9) | ||
4 | DDA v SDA | −1.0 (−4.5 to 2.5) | |||
Weighted event rates | RBI (CI) | NNT (CI) | |||
Realistic expectations | 4 | DA v UC | 60% v 42% | 44% (11 to 88) | 6 (4 to 17) |
4 | DDA v SDA | 69% v 47% | 45% (26 to 67) | 5 (4 to 8) | |
RRR (CI) | |||||
Preferences and uptake (major surgery) | 5 | DA v UC | 27% v 32% | 24% (9 to 37) | Not significant |
2 | DDA v SDA | 24% v 30% | 22% (–7 to 43) | Not significant | |
Remaining undecided | 3 | DA v UC | 3% v 19% | 57% (30 to 73) | 7 (4 to 100) |
Passive role | 7 | DA v UC | 15% v 21% | 32% (11 to 47) | Not significant |