Table 2
Demographic and morphometric comparison between OI and control groups. F: Female. M: Male. aLPFA: anatomical lateral proximal femoral angle.
| Parameter | OI group (n = 24) | Control group (n = 24) | p-value | Significant difference |
|---|---|---|---|---|
| Age (years) | 16.1 ± 10.6 | 15.3 ± 9.4 | 0.76 | No |
| Sex (F:M) | 8:16 | 9:15 | 0.76 | No |
| Side (Right:Left) | 13:11 | 17:7 | 0.22 | No |
| Femoral neck length (mm) | 52.71 ± 9.85 | 64.83 ± 9.62 | <0.001 | Yes |
| Femoral neck diameter (mm) | 19.38 ± 4.68 | 32.83 ± 4.77 | <0.0001 | Yes |
| Femoral head diameter (mm) | 37.17 ± 5.81 | 47.00 ± 6.70 | <0.001 | Yes |
| Neck length-to-diameter ratio | 2.82 ± 0.63 | 1.98 ± 0.19 | <0.000001 | Yes |
| Neck length-to-head diameter ratio | 1.44 ± 0.25 | 1.38 ± 0.10 | 0.34 | No |
| Neck-shaft angle (°) | 135.79 ± 19.15 | 129.88 ± 4.35 | 0.15 | No |
| aLPFA (°) | 95.04 ± 23.55 | 85.25 ± 6.10 | 0.059 | No (trend) |
| Acetabular protrusion (mm) | –5.45 ± 12.62 | 8.05 ± 3.36 | <0.0001 | Yes |
| Correlation (neck length-to-diameter ratio vs. protrusion) | r = 0.0012 | – | 0.996 | No |
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