Table 1.
Demographic data with reference to age when DDH management of CR was initiated
| Group I | Group II | Group III | |
|---|---|---|---|
| No. of hips (cases) | 71 (45) | 50 (37) | 35 (25) |
| Age at present0(months) | 7 (1.8) | 15 (1.6) | 19 (2.1) |
| range | 4–10 | 12–17 | 18–28 |
| Sex (girls: boys) | 39:6 | 33:4 | 23:2 |
| Side (unilateral: bilateral) | 19:26 | 24:13 | 15:10 |
| Walking | 0 | 33 b | 35 b |
| Femoral head (yes: no) | 20:51 | 48:2 | 35:0 |
| Orthosis time0 (mons) | 6.6 (2.1) | 5.9 (2.1) | 6.8 (1.9) |
| Pre-op Tonnis | |||
| I | 8 | 1 | 2 |
| II | 3 | 7 | 2 |
| III | 34 | 13 | 9 |
| IV | 26 | 29 | 22 |
| Pre-op IHDI | |||
| I | 2 | 0 | 1 |
| II | 11 | 10 | 2 |
| III | 48 | 19 | 16 |
| IV | 10 | 21 | 16 |
| Pre-op AI0 | 36.9 (6.9) | 38.1 (4.5) | 39.2 (5.8) |
| Post-op AI0 | 25.5 (5.0) | 27.9 (5.1) b | 29.6 (5.5) b |
| Post-op Tonnis | |||
| I | 47 | 35 | 25 |
| II | 11 | 5 | 6 |
| III | 7 | 10 | 1 |
| IV | 6 | 0 | 3 |
| Post-op IHDI | |||
| I | 45 | 34 | 22 |
| II | 11 | 8 | 9 |
| III | 11 | 8 | 4 |
| IV | 4 | 0 | 0 |
| AVN (%) | 10 (14.1%) | 9 (18.0%) | 5 (14.3%) |
| Re-dislocation (%) | 9 (12.7%) | 8 (16.0%) | 6 (17.1%) |
| RAD (%) | 6 (8.5%) | 7 (14.0%) | 14 (40%) ab |
| FS (%) | 15 (21.1%) | 15 (30.0%) | 22 (62.9%) ab |
Group I (< 12 months), Group II (12 months to ≤18 months), Group III (> 18 months)
AI Acetabular Index, RAD Residual Acetabular Dysplasia, FS Further Surgeries, IHDI International Hip Dysplasia Institute, AVN avascular necrosis.
0 values of mean (SD)
a: p < 0.05 compared with Group II
b: p < 0.05 compared with Group I