Table 9 Predicted powers for three effect sizes in combination with different cluster sizes and the number of clusters = 20, prevalence rate = 50%, OTE = log(1.68) for a nested correlation structure
Magnitude of HTE with I = 20 | method | m | |||||
|---|---|---|---|---|---|---|---|
20 | 40 | 60 | 80 | 100 | 120 | ||
\({\theta }_{3}={\text{log}}\left(1.5\right)\) | GEE | 0.530 | 0.820 | 0.940 | 0.982 | 0.995 | 0.999 |
GEE-KC | 0.505 | 0.795 | 0.926 | 0.975 | 0.992 | 0.998 | |
GEE-MD | 0.481 | 0.770 | 0.910 | 0.967 | 0.989 | 0.996 | |
\({\theta }_{3}={\text{log}}\left(2\right)\) | GEE | 0.935 | 0.998 | 1.000 | 1.000 | 1.000 | 1.000 |
GEE-KC | 0.921 | 0.997 | 1.000 | 1.000 | 1.000 | 1.000 | |
GEE-MD | 0.904 | 0.996 | 1.000 | 1.000 | 1.000 | 1.000 | |