Knee varus alters three-dimensional ankle alignment in standing- a study with upright computed tomography

Table 3 Correlation between the knee joint and talocrural joint in each grade of knee OA

Joint Plane			Correlation coefficient (P value)
Knee	Talocrural	Chart	All	KL-I	KL-II	KL-III	KL-IV
Sagittal	Sagittal	a)	−0.051	− 0.536	− 0.012	0.120	0.008
	Sagittal	a)	(0.350)	(0.090)	(0.972)	(0.726)	(0.980)
	Coronal	b)	−0.193	0.587	− 0.570	− 0.079	− 0.076
	Coronal	b)	(0.203)	(0.057)	(0.067)	(0.818)	(0.813)
	Axial	c)	0.134	0.337	−0.032	−0.152	0.022
	Axial	c)	(0.381)	(0.311)	(0.925)	(0.655)	(0.945)
Coronal	Sagittal	d)	0.311	0.133	0.350	0.774**	0.447
	Sagittal	d)	(0.125)	(0.696)	(0.292)	(0.005)	(0.145)
	Coronal	e)	−0.337*	− 0.359	− 0.659*	− 0.676*	− 0.368
	Coronal	e)	(0.032)	(0.279)	(0.027)	(0.022)	(0.240)
	Axial	f)	−0.154	0.760**	−0.007	0.005	0.566
	Axial	f)	(0.210)	(0.007)	(0.983)	(0.358)	(0.055)
Axial	Sagittal	g)	0.045	0.404	−0.685*	−0.572	0.101
	Sagittal	g)	(0.229)	(0.217)	(0.020)	(0.066)	(0.496)
	Coronal	h)	0.174	−0.140	0.227	0.307	0.490
	Coronal	h)	(0.280)	(0.681)	(0.409)	(0.358)	(0.106)
	Axial	i)	−0.052	−0.478	0.549	0.047	0.454
	Axial	i)	(0.999)	(0.137)	(0.080)	(0.891)	(0.138)

* Indicates significance at P < 0.05
** Indicates significance at P < 0.01
Pearson’s correlation coefficients and Spearman’s rank correlation coefficients were used to determine the relationship between the alignment of the knee joint and the talocrural joint. In KL-I, the angle of the coronal plane of the knee joint and the angle of the coronal plane of the talocrural joint were correlated. In KL-II, there were correlations between the angle of the axial plane of the knee joint and the angle of the sagittal plane of the talocrural joint, and the angle of the coronal plane of the knee joint and the angle of the coronal plane of the talocrural joint. In KL-III, the angle of the coronal plane of the knee joint and the angle of the sagittal and coronal plane of the talocrural joint were correlated. In KL-IV, there was no correlation between the knee and talocrural joint

ISSN: 1471-2474