Effectiveness outcomes of the interventions (n = 87)
| Outcome | Total AB, mean (range), % | n | First choice, mean (range), % | n |
|---|---|---|---|---|
| δδ | –8.7 (–27 to 18.8) | 33 | 9.2 (–2 to 27.2) | 15 |
| δ | –12.3 (–37 to 4.3) | 16 | 11.1 (-5 to 41) | 11 |
| diff i-a | –20.3 (–72 to –1) | 10 | 3.6 (2 to 5.1) | 2 |
δδ = difference of differences for interventions with a before and after measurement and a control group. δ = difference for interventions with a before and after measurement without a control group. diff i-a = difference in after measurement for interventions with a control group but without a before measurement.