Table 2 |
||||
|
Four Point Difference in BDI |
||||
|
ICC |
Design effect* |
Total sample size |
Number of practices required |
|
|
Required |
With 25% drop-out |
|||
|
|
||||
|
0 |
1 |
400 |
534 |
40 |
|
0.01 |
1.09 |
436 |
581 |
44 |
|
0.02 |
1.18 |
472 |
630 |
47 |
|
0.03 |
1.27 |
508 |
678 |
51 |
|
0.04 |
1.36 |
544 |
725 |
54 |
|
0.05 |
1.45 |
580 |
774 |
58 |
|
|
||||
|
*Design effect = 1 + (n-1) × ICC, based on clusters with 10 individuals per cluster. |
||||
|
Buszewicz et al. BMC Psychiatry 2010 10:61 doi:10.1186/1471-244X-10-61 |
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