Introduction
Patients and methods
Sharp’s angle
Acetabular depth-to-width ratio (ADR)
Lateral acetabular inclination
Femoral head sphericity
Statistical analysis
Results
Sharp’s angle
Time of observation | Mean Sharp’s angle (SD) | Mean ADR (SD) | ||
---|---|---|---|---|
Perthes’ hip | Unaffected hip | Perthes’ hip | Unaffected hip | |
At diagnosis | 45.5 (3.8) | 44.9 (3.6) (n = 117) | 282.3 (35.1) | 305.1 (31.2) (n = 117) |
1-year follow-up | 45.0 (4.4) | 44.4 (3.7) (n = 113) | 254.9 (38.7) | 310.2 (32.1) (n = 113) |
5-year follow-up | 45.7 (4.4) | 42.2 (3.7) (n = 107) | 263.3 (42.6) | 309.1 (38.1) (n = 107) |
Acetabular depth-to-width ratio
Lateral acetabular inclination
Lateral acetabular inclination | At diagnosis | 1-year follow-up | 5-year follow-up | |||
---|---|---|---|---|---|---|
Perthes’ hip | Unaffected hip | Perthes’ hip | Unaffected hip | Perthes’ hip | Unaffected hip | |
Down | 36 | 62 | 11 | 70 | 3 | 83 |
Horizontal | 78 | 55 | 78 | 43 | 60 | 38 |
Up | 9 | 0 | 34 | 0 | 60 | 1 |
Total | 123 | 117 | 123 | 113 | 123 | 122 |
Prognostic factors for a spherical femoral head at the 5-year follow-up
Prognostic factor | OR | 95 % CI | p-Value |
---|---|---|---|
Lateral pillar classification | 0.188 | 0.086–0.410 | <0.001 |
Treatment | 2.731 | 1.384–5.391 | 0.004 |
Catterall classification | 0.156 | 0.073–0.332 | <0.001 |
ADR at diagnosis | 1.012 | 1.002–1.022 | 0.016 |
Femoral head coverage at 1 year | 0.971 | 0.942–1.002 | 0.064 |
Age at diagnosis | 1.012 | 0.988–1.035 | 0.334 |
Gender | 1.213 | 0.566–2.600 | 0.620 |
Sharp’s angle | 1.021 | 0.036–1.114 | 0.641 |
Acetabular lateral inclinationa | 0.792 | 0.219–2.858 | 0.721 |
1.558 | 0.731–3.323 | 0.251 |
Prognostic factor | OR | 95 % CI | p-Value |
---|---|---|---|
Lateral pillar classification | 0.276 | 0.119–0.644 | 0.003 |
Treatment | 2.927 | 1.349–6.350 | 0.007 |
Catterall classification | 0.324 | 0.138–0.760 | 0.010 |
ADR at diagnosis | 1.011 | 1.000–1.022 | 0.061 |