Percutaneous medial hemi-epiphysiodesis using a transphyseal screw for caput valgum associated with developmental dysplasia of the hip

Table 4 Differences of radiologic parameters between the operated and contralateral sides

N = 14	Preoperative status^a	Latest follow-up^a	P value†
Proximal femur
Difference of HEA^b (°)	16.9 ± 15.1	2.4 ± 12.4	0.008
Difference of HSA^c (°)	15.5 ± 11.2	−2.5 ± 13.0	0.001
Difference of NSA^c (°)	5.5 ± 5.6	0.9 ± 6.6	0.056
Femoral neck
Difference of ATD^c (mm)	3.2 ± 5.5	−5.6 ± 9.1	0.001
Difference of femoral neck length ratio	Not applicable	Not applicable
Acetabular morphology & subluxation^d
Difference of Sharp angle^c (°)	−1.9 ± 6.2	0.33 ± 7.7	0.187
Difference of acetabular roof angle^c (°)	3.3 ± 6.1	8.3 ± 9.3	0.011
Difference of LCEA^b (°)	2.1 ± 7.8	8.1 ± 9.1	0.009
Difference of CHDD (%)	Not applicable	Not applicable

†Wilcoxon signed rank test
^aThe values are given as the mean and the standard deviation
^bThese values were calculated by subtracting the values of the operated hips from the values of the contralateral hips
^cThese values were calculated by subtracting the values of the contralateral hips from the values of the operated hips
^dTwo hips which underwent pelvic osteotomy concurrent with hemi-epiphysiodesis were excluded

ISSN: 1471-2474