Femoral head translation in borderline and definite dysplastic hips during weight-bearing: 2D/3D image registration analysis

Journal of Experimental Orthopaedics

Table 1 Patients’ demographic and morphological parameters of the definite DDH and borderline DDH groups

	Total Mean ± SD	Definite DDH Mean ± SD	Borderline DDH Mean ± SD	p value
Number of patients	13	9	4
Age (years)	29.8 ± 11.0	32.2 ± 10.4	24.0 ± 8.7	0.25
Sex (female/male)	13/0	9/0	3/0
Height (cm)	156.1 ± 4.8	154.7 ± 1.5	159.5 ± 4.7	0.098
Weight (kg)	53.1 ± 5.9	52.6 ± 2.1	54.1 ± 3.1	0.69
BMI (kg/m²)	21.8 ± 2.2	22.0 ± 1.1	21.3 ± 3.9	0.59
CE angle (°)	8.69 ± 11.4	3.11 ± 9.0	21.25 ± 1.7	0.0025^*
ARO (°)	25.2 ± 12.7	31.2 ± 9.5	11.5 ± 7.0	0.0035^*
AHI (%)	58.8 ± 12.8	52.4 ± 9.7	73.0 ± 3.8	0.0021^*
Sharp angle (°)	51.8 ± 4.71	54.1 ± 3.8	46.5 ± 2.9	0.0018^*
VCA angle (°)	11.2 ± 16.6	3.9 ± 10.2	27.8 ± 17.2	0.0087^*
FEAR index (°)	6.3 ± 12.8	13.0 ± 5.4	-8.75 ± 11.7	0.0006^**
AASA (°)	40.1 ± 8.2	38.5 ± 9.2	43.7 ± 4.6	0.31
PASA (°)	92.2 ± 6.3	90.6 ± 5.2	95.7 ± 8.0	0.19
K-L Glade	Glade 0: 4	Glade 0: 1	Glade 0: 3
	Glade 1: 6	Glade 1: 5	Glade 1: 1
	Glade 2: 3	Glade 2: 3	Glade 2: 0

SD standard deviation, BMI body mass index, CE angle center edge angle, ARO acetabular roof obliquity, AHI acetabular-head index, VCA angle vertical-center-anterior angle, FEAR index femoro-epiphyseal acetabular roof index, AASA anterior acetabular sector angle, PASA posterior acetabular sector angle, K-L Glade Kallgren-Lawrence Glade
^*Significantly different between the definite DDH group and the borderline DDH group (p < 0.05)
^**Significantly different between the definite DDH group and the borderline DDH group (p < 0.01)