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Relationship between type of reduction and ON
| Type of reduction | Group 0 (69 hips) | Group A (23 hips) | Group B (41 hips) |
|---|---|---|---|
| Closed reduction (77 hips) | 50 (65%) | 18 (23%) | 9 (12%) |
| Open reduction (56 hips) | 19 (34%) | 5 (9%) | 32 (57%) |
p < 0.001 using Pearson chi square test; ON = osteonecrosis.
