High femoral anteversion in osteoarthritic knees, particularly for severe valgus deformity

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 1 Intraclass correlation coefficients of the interobserver and intraobserver error in all parameters

	Intraobserver		Interobserver
	ICC	95% CI	ICC	95% CI
Femoral anteversion*
pFA	0.971	0.945 to 0.982	0.933	0.893 to 0.956
tFA	0.983	0.978 to 0.987	0.943	0.875 to 0.960
Mechanical alignment of lower extremity*
MTA	0.996	0.994 to 0.997	0.917	0.866 to 0.946
Morphology of the femoral trochlea*
SA	0.925	0.835 to 0.959	0.819	0.762 to 0.885
LTS	0.850	0.640 to 0.921	0.803	0.714 to 0.853
MTS	0.896	0.764 to 0.944	0.795	0.727 to 0.845
LTH	0.908	0.853 to 0.927	0.902	0.796 to 0.940
MTH	0.899	0.667 to 0.958	0.875	0.639 to 0.932
LTH-BH	0.892	0.837 to 0.918	0.874	0.779 to 0.921
MTH-BH	0.878	0.621 to 0.948	0.873	0.687 to 0.918
BAC	0.790	0.698 to 0.838	0.776	0.628 to 0.806

ICC intraclass correlation coefficient, pFA femoral anteversion based on the posterior condylar line, tFA femoral anteversion based on the clinical transepicondylar axis, MTA mechanical tibiofemoral angle, SA sulcus angle, LTS lateral trochlear slope, MTS medial trochlear slope, LTH lateral trochlear height, MTH medial trochlear height, LTH-BH lateral trochlear height relative to body height, MTH-BH medial trochlear height relative to body height, BAC bianterior condyle ratio
*The values given are the intraclass correlation coefficient and the 95% confidence interval