Table 2 Summary of clinical features of study subjects
Characteristics | Young | Middle | Older | Total |
|---|---|---|---|---|
Patients (hips) | 183(206) | 391(576) | 78(82) | 652(864) |
Age (y) | 1.9 ± 0.23 | 4.6 ± 0.65 | 9.6 ± 1.2 | 5.8 ± 2.12 |
Sex | ||||
Male (%) | 29(16.1) | 57(14.7) | 13(17) | 99(15.2) |
Female (%) | 154(83.9) | 334(85.3) | 65(83) | 553(84.8) |
AI (d) | 43.5 ± 5.12 | 41.2 ± 3.12 | 42.6 ± 1.5 | 42.2 ± 6.32 |
Tonnis grade (hips) | ||||
Grade I | 34 | 86 | 16 | 136 |
Grade II | 56 | 157 | 46 | 259 |
Grade III | 77 | 186 | 10 | 273 |
Grade IV | 39 | 147 | 10 | 196 |
Follow-up (y) | 6.4 ± 2.81 | 6.12 ± 2.23 | 6.15 ± 2.45 | 6.20 ± 2.98 |