Femoral Valgus Correction Angle for the Intramedullary Alignment Rod Is Strongly Associated with Femoral Lateral Bowing in Japanese Patients with Varus Knee Osteoarthritis Undergoing Total Knee Arthroplasty

Table 3

Results of linear regression analysis on variables associated with the VCA for the IM rod.

Variable	Standardized βcoefficient	95% CI	value
FBA	0.75	(0.35, 0.40)	<0.001
Femoral offset	0.38	(0.12, 0.16)	<0.001
MA-DFC angle	−0.16	(−0.13, −0.06)	<0.001
Female	0.10	(0.22, 0.64)	<0.001
MA-SEA angle	−0.06	(−0.07, −0.002)	<0.05

R ² = 0.85, ANOVA VCA for the IM rod: femoral valgus correction angle for the intramedullary alignment rod, FBA: femoral lateral bowing angle, MA-DFC angle: medial angle between the FMA and the DFC, FMA: femoral mechanical axis, DFC: the line that connects the distal margins of the medial and lateral femoral condyles, MA-SEA angle: medial angle between the FMA and the SEA, SEA: surgical epicondylar axis, CI: confidence interval.