From: Clustering in surgical trials - database of intracluster correlations
Outcome | ICC† | Average cluster size | Design effectχ | ||
---|---|---|---|---|---|
expertise-based design | stratified design | ||||
EQ-5D 12 m | 0.01 | min(centre)* | 9.4 | 1.08 | 0.99 |
0.01 | median(centre)* | 32.4 | 1.31 | 0.99 | |
0.01 | max(centre)* | 51.1 | 1.50 | 0.99 | |
0.01 | median adj.(centre)‡ | 64.4 | 1.63 | 0.99 | |
0.01 | min(surgeon)* | 2.8 | 1.02 | 0.99 | |
0.01 | median(surgeon)* | 6.1 | 1.05 | 0.99 | |
0.01 | max(surgeon)* | 29.9 | 1.29 | 0.99 | |
0.01 | median adj.(surgeon)‡ | 35.3 | 1.34 | 0.99 | |
Operation time | 0.27 | min(centre)* | 9.4 | 3.27 | 0.73 |
0.27 | median(centre)* | 32.4 | 9.48 | 0.73 | |
0.27 | max(centre)* | 51.1 | 14.53 | 0.73 | |
0.27 | median adj.(centre)‡ | 64.4 | 18.12 | 0.73 | |
0.27 | min(surgeon)* | 2.8 | 1.49 | 0.73 | |
0.27 | median(surgeon)* | 6.1 | 2.38 | 0.73 | |
0.27 | max(surgeon)* | 29.9 | 8.80 | 0.73 | |
0.27 | median adj.(surgeon)‡ | 35.3 | 10.25 | 0.73 |