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| Grade | Criteria | Number | Percentage |
|---|---|---|---|
| I | Capital femoral epiphysis medial to Perkins line | 0 | 0 |
| II | Capital femoral epiphysis medial to Perkins line, but below the level of the superior acetabular rim | 3 | 11.5% |
| III | Capital femoral epiphysis at the level of the superior acetabular rim | 14 | 53.8 |
| IV | Capital femoral epiphysis above the level of the superior acetabular rim | 9 | 34.7 |
