Table 4.
Morphological comparison of the hip joints between the closed and open reduction groups at the final follow-up
| Closed reduction number (%) | Open reduction number (%) | p value | |
|---|---|---|---|
| Residual acetabular dysplasia | |||
| Positive | 18 (32.14) | 14 (48.28) | 0.146 |
| Negative | 38 (67.86) | 15 (51.72) | |
| Height-to-width index | |||
| ≥ 0.357 | 52 (92.86) | 29 (100) | 0.294* |
| < 0.357 | 4 (7.14) | 0 (0) | |
| Alsberg angle | |||
| ≤ 81º | 38 (67.86) | 12 (41.38) | 0.019 |
| > 81º | 18 (32.14) | 17 (58.62) | |
| Reimer’s migration index | |||
| ≤ 33% | 40 (71.43) | 15 (51.72) | 0.071 |
| > 33% | 16 (28.57) | 14 (48.28) | |
*The calculation of p value adopts Fisher's exact probability test; the rest adopts chi-square test