Table 1 Empirical versus theoretical power by variance misspecification
From: An internal pilot design for prospective cancer screening trials with unknown disease prevalence
γ | Empirical power | Theoretical power | Absolute deviation |
|---|---|---|---|
0.5 | 0.9945 | 0.995 | 0.0005 |
0.75 | 0.9646 | 0.964 | 0.0006 |
1 | 0.9369 | 0.934 | 0.0029 |
1.25 | 0.9168 | 0.922 | 0.0052 |
1.5 | 0.9144 | 0.916 | 0.0016 |
1.75 | 0.9137 | 0.913 | 0.0007 |
2 | 0.9136 | 0.910 | 0.0036 |