| Number of cluster merges per treatment group | |||||
---|---|---|---|---|---|---|
Empirical estimates | 0 | 1 | 2 | 5 | 10 | 20 |
Assigned to control | Â | Â | Â | Â | Â | Â |
Intercept, β0 | 0.001 (−0.003, 0.004) | 0.003 (0.000, 0.007) | 0.003 (0.000, 0.007) | 0.007 (0.004, 0.011) | 0.017 (0.013, 0.020) | 0.035 (0.032, 0.0380) |
Treatment effect, β1 | 0.201 (0.196, 0.205) | 0.196 (0.191, 0.199) | 0.196 (0.191, 0.201) | 0.191 (0.186, 0.196) | 0.184 (0.179, 0.189) | 0.166 (0.159, 0.172) |
| 0.050 (0.048, 0.051) | 0.049 (0.048, 0.051) | 0.049 (0.047, 0.0496) | 0.046 (0.045, 0.047) | 0.043 (0.042, 0.044) | 0.034 (0.033, 0.036) |
| 0.950 (0.948, 0.952) | 0.951 (0.950, 0.953) | 0.952 (0.950, 0.954) | 0.957 (0.954, 0.959) | 0.962 (0.959, 0.964) | 0.971 (0.969, 0.974) |
Intracluster correlation coefficient | 0.050 (0.048, 0.051) | 0.049 (0.048, 0.0499) | 0.049 (0.047, 0.0494) | 0.046 (0.044, 0.047) | 0.042 (0.041, 0.044) | 0.034 (0.033, 0.035) |
Empirical power | 81.2% | 78.1% | 78.3% | 76.8% | 72.1% | 48.2% |
Assigned to intervention | Â | Â | Â | Â | Â | Â |
Intercept, β0 | 0.003 (<0.001, 0.007) | 0.001 (−0.003, 0.004) | 0.002 (−0.002, 0.006) | −0.002 (−0.006, 0.001) | 0.001 (−0.004, 0.005) | −0.004 (−0.010, 0.002) |
Treatment effect, β1 | 0.198 (0.193, 0.202) | 0.195 (0.191, 0.1997) | 0.194 (0.189, 0.199) | 0.192 (0.187, 0.197) | 0.179 (0.174, 0.184) | 0.168 (0.162, 0.175) |
| 0.049 (0.048, 0.051) | 0.050 (0.048, 0.051) | 0.048 (0.047, 0.0493) | 0.047 (0.046, 0.049) | 0.044 (0.042, 0.045) | 0.034 (0.033, 0.035) |
| 0.949 (0.947, 0.951) | 0.951 (0.949, 0.953) | 0.953 (0.951, 0.955) | 0.956 (0.954, 0.958) | 0.963 (0.961, 0.965) | 0.973 (0.971, 0.976) |
Intracluster correlation coefficient | 0.049 (0.048, 0.050) | 0.049 (0.048, 0.051) | 0.048 (0.047, 0.049) | 0.047 (0.046, 0.048) | 0.043 (0.042, 0.044) | 0.033 (0.032, 0.035) |
Empirical power | 81.0% | 79.7% | 77.3% | 75.8% | 67.2% | 50.7% |
Completers only | Â | Â | Â | Â | Â | Â |
Intercept, β0 | −0.000 (−0.004, 0.003) | 0.004 (0.000, 0.007) | 0.001 (−0.003, 0.005) | −0.000 (−0.004, 0.003) | 0.001 (−0.002, 0.005) | −0.000 (−0.004, 0.003) |
Treatment effect, β1 | 0.200 (0.195, 0.205) | 0.195 (0.190, 0.1991) | 0.198 (0.193, 0.203) | 0.199 (0.194, 0.204) | 0.198 (0.193, 0.203) | 0.200 (0.194, 0.205) |
| 0.050 (0.049, 0.051) | 0.050 (0.048, 0.051) | 0.050 (0.049, 0.051) | 0.051 (0.049, 0.052) | 0.050 (0.049, 0.051) | 0.050 (0.048, 0.051) |
| 0.950 (0.948, 0.952) | 0.952 (0.950, 0.954) | 0.949 (0.947, 0.952) | 0.950 (0.947, 0.952) | 0.951 (0.948, 0.953) | 0.948 (0.946, 0.951) |
Intracluster correlation coefficient | 0.050 (0.049, 0.051) | 0.050 (0.048, 0.051) | 0.050 (0.049, 0.051) | 0.050 (0.049, 0.052) | 0.050 (0.048, 0.051) | 0.050 (0.048, 0.051) |
Empirical power | 82.3% | 79.2% | 79.6% | 79.5% | 77.1% | 73.3% |