Table 5 Power for the adjusted Begg and Mazumdar test based on Kendall’s tau: Small meta-analyses*
Power | ||||
|---|---|---|---|---|
[% selected for inclusion, bias] | ||||
Selection strength | Strong** | Moderate*** | ||
Range of variances | Large† | Small‡ | Large† | Small‡ |
Treatment effect (δ) | ||||
.0 | 73% | 24% | 48% | 16% |
[36%,.34] | [37%,.74] | [57%,.25] | [57%,.54] | |
.5 | 69% | 23% | 37% | 14% |
[54%,.16] | [52%,.54] | [74%,.09] | [73%,.35] | |
1.0 | 56% | 20% | 25% | 10% |
[65%,.07] | [67%,.37] | [82%,.04] | [85%,.20] | |
1.5 | 44% | 15% | 17% | 7% |
[72%,.05] | [80%,.23] | [87%,.02] | [92%,.10] | |
2.0 | 32% | 10% | 12% | 6% |
[78%,.03] | [88%,.13] | [90%,.02] | [96%,.05] | |
2.5 | 24% | 7% | 9% | 5% |
[82%,.02] | [93%,.07] | [93%,.01] | [98%,.03] | |
3.0 | 19% | 6% | 7% | 5% |
[86%,.02] | [97%,.04] | [94%,.01] | [99%,.01] | |