Table 3.
Comparison of Salter and Pemberton groups
| Clinical and radiographic findings | Salter osteotomy (95% CI) | Pemberton acetabuloplasty (95% CI) | p value |
|---|---|---|---|
| Symptoms† (pain, soreness, discomfort of surgically treated hip) | 1/14 (7%) | 3/28 (11%) | 1.000 |
| Relative risk ratio, 0.67 (0.08, 5.84) | |||
| Anterior impingement sign† | 0/14 (0%) | 3/28 (11%) | 0.539 |
| Relative risk ratio, 0 | |||
| VCA angle (degrees)* | 44 (37.14, 50.98) | 43 (37.65, 48.11) | 0.885 |
| AAHI (%)* | 86 (81.49, 90.84) | 86 (82.44, 88.82) | 0.906 |
| WAI (degrees)* | 12 (9.26, 15.07) | 6 (4.84, 7.16) | 0.001 |
| VCA angle ratio* | 1.06 (0.92, 1.21) | 1.00 (0.91, 1.09) | 0.609 |
| AAHI ratio* | 0.98 (0.93, 1.02) | 0.97 (0.94, 1.00) | 0.932 |
| WAI ratio* | 0.94 (0.70, 1.17) | 0.53 (0.40, 0.65) | < 0.001 |
| Kalamchi classification | |||
| No avascular necrosis | 0 | 5 | |
| Group I | 3 | 3 | |
| Group II | 7 | 13 | |
| Group III | 4 | 7 | |
| Group IV | 0 | 0 | |
| Harris hip score* | 99 (97.77, 99.94) | 99 (99.08, 100.06) | 0.362 |
| SF-36* | 83 (76.54, 89.03) | 85 (80.86, 89.07) | 0.468 |
| SF-36 (physical health dimension)* | 82 (75.81, 88.34) | 87 (83.23, 90.62) | 0.198 |
| SF-36 (mental health dimension)* | 78 (70.39, 85.32) | 79 (73.77, 84.38) | 0.742 |
* Mann-Whitney test; †Fisher’s exact test; VCA angle = vertical-center- anterior margin angle; AAHI = anterior acetabular head index; WAI = weightbearing zone acetabular index; relative risk ratio of all parameters is the value of the surgically treated side divided by that of the nonoperated side.