Table 1.
Power to detect the intervention effect on documented preferences, according to three sources of information (n = 86 dyads per group, two-sided α = 0.05)
| Source | Odds ratio (95% CI) |
Event rate in the Control group |
Event rate in the Experimental group | Power |
|---|---|---|---|---|
| Bravo et al. [39] | 4.0 (1.6 - 10.4) | 0.12* | 95% | |
| Patel et al. [87] | 3.7 (1.5 - 9.4) | 0.12* | 92% | |
| Pearlman et al. [10] | 0.23 | 0.48 | 93% |
* Derived from 13 RCTs included in our systematic review (mean = 0.12, sd = 0.182, range: 0 to 0.56) and applied to Patel et al. who did not report the mean event rate across control groups.