Table 3 Summary of ICC estimates
From: Clustering in surgical trials - database of intracluster correlations
| Â | Centre level | Surgeon level | Â | |||||
|---|---|---|---|---|---|---|---|---|
Outcome | N | Med | Min | Max | N | Med | Min | Max |
EQ-5D 1 wk | 1 | 0.029 | - | - | 1 | 0.023 | - | - |
EQ-5D 3 m | 6 | 0.001 | 0 | 0.06 | 6 | 0.015 | 0 | 0.071 |
EQ-5D 12 m | 5 | 0.007 | 0 | 0.04 | 5 | 0.002 | 0 | 0.04 |
EQ-5D 60 m | 3 | 0.002 | 0 | 0.02 | 3 | 0.009 | 0 | 0.019 |
Oxford knee score 3 m | 3 | 0.041 | 0 | 0.07 | 3 | 0.05 | 0.007 | 0.068 |
Oxford knee score 12 m | 3 | 0.027 | 0.021 | 0.06 | 3 | 0.056 | 0.047 | 0.059 |
Oxford knee score 60 m | 3 | 0.044 | 0 | 0.05 | 3 | 0.037 | 0.002 | 0.051 |
Operating time | 9 | 0.268 | 0.072 | 0.45 | 8 | 0.394 | 0.093 | 0.514 |
Length of stay | 5 | 0.104 | 0.012 | 0.35 | 5 | 0.045 | 0 | 0.345 |
Surgical complications* | 4 | 0.005 | 0 | 0.12 | 4 | 0.072 | 0.009 | 0.084 |
HRQ overall score 4 m | 1 | 0.058 | - | - | 1 | 0.114 | - | - |
HRQ overall score 12 m | 1 | 0 | - | - | 1 | 0 | - | - |
HRQ overall score 24 m | 1 | 0 | - | - | 1 | 0 | - | - |
RQLS score 3 m | 1 | 0.143 | - | - | 1 | 0.143 | - | - |
RQLS score 12 m | 1 | 0.058 | - | - | 1 | 0 | - | - |
Dist. visual acuity (ETDRS) 6 m | 1 | 0.175 | - | - | - | - | - | - |