Cluster Trial Parameters
Select the type of calculation
Expected mean in control group
Expected mean in treatment group
Common SD (individual level)
Number of treatment arms
Intraclass correlation coefficient
Average individuals per cluster
Typical ICC Values
| Setting | ICC Range |
|---|---|
| Primary care practices | 0.01 - 0.05 |
| Hospitals/wards | 0.01 - 0.10 |
| Schools/classrooms | 0.10 - 0.25 |
| Villages/communities | 0.02 - 0.15 |