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| Characteristics | Cases | Controls | P value | ||
|---|---|---|---|---|---|
| Age (Range) | 18.5 (11–64) | 21.5 (14–67) | 0.569 | ||
| Gender | 0.689 | ||||
| Male | 23 | 76.7 | 7 | 70.0 | |
| Female | 7 | 23.3 | 3 | 30.0 | |
| Histology | |||||
| Osteoblastic | 14 | 46.7 | / | ||
| Fibroblastic | 7 | 23.3 | / | ||
| Chondroblastic | 5 | 16.7 | / | ||
| Mixed | 4 | 13.3 | / | ||
| APE1 Expression | |||||
| Negative | 7 | 23.3 | 9 | 90.0 | < 0.001 |
| Positive | 23 | 67.7 | 1 | 10.0 | |
