Mean difference (SD = 5%) | ICC | IF | Total N needed for individual randomization | Total N needed for CRT | Total # of clusters = N/100a |
---|---|---|---|---|---|
4% | 0.01 | 2.99 | 52 | 156 | 2 |
0.02 | 4.98 | 52 | 259 | 4 | |
0.05 | 10.95 | 52 | 570 | 6 | |
3% | 0.01 | 2.99 | 90 | 270 | 4 |
0.02 | 4.98 | 90 | 449 | 6 | |
0.05 | 10.95 | 90 | 986 | 10 |