The anteroposterior axis of the tibia is adjusted to approximately a right angle to the anterior pelvic plane in the standing position in patients with hip dysplasia similar to normal subjects: a cross-sectional study

Table 3 Correlation coefficient between each parameter in the normal and DDH groups

	CTA (deg)	KRA (deg)	APP-FNA (deg)	APP-CEA (deg)	APP-tibia AP axis (deg)
FNA (deg)	0.085	0.130	0.421*	− 0.352*	− 0.009
FNA (deg)	0.365	0.319	0.433*	− 0.451*	− 0.176
CTA (deg)		− 0.211	0.142	0.176	0.096
CTA (deg)		0.505*	0.205	− 0.042	0.338
KRA (deg)			0.086	− 0.218	− 0.214
KRA (deg)			0.107	− 0.181	0.266*
APP-FNA (deg)				− 0.396*	− 0.077
APP-FNA (deg)				0.410*	0.226
APP-CEA (deg)					0.048
APP-CEA (deg)					0.375*

Upper row: normal group; lower row: DDH group
AP anteroposterior, APP anterior pelvic plane, APP-CEA clinical epicondylar axis relative to APP, APP-FNA FNA relative to APP, CTA condylar twist angle, FNA femoral neck anteversion, KRA knee rotation angle
*p < 0.05

ISSN: 1749-799X