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Inter-observer agreement, given as the number of hips according to the Stulberg classification
| Agreement | Kappa(W) | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| N 1 | Stulberg classes | N 2 | % | ||||||
| 1 | 2 | 3 | 4 | 5 | |||||
| SS/TT | 101 | 17 | 26 | 24 | 5 | 0 | 72 | 71 | 0.65 |
| SS/OW | 101 | 19 | 14 | 30 | 3 | 0 | 66 | 65 | 0.57 |
| TT/OW | 101 | 15 | 15 | 29 | 4 | 0 | 63 | 62 | 0.51 |
SS, TT and OW are the paediatric orthopaedic surgeons, N 1 is the number of hips examined, N 2 is the number of patients agreed upon, % is the percentage agreement and Kappa(W) is the weighted kappa
