Pre-operative templating in THA using a short stem system: precision and accuracy of 2D versus 3D planning method

Journal of Orthopaedics and Traumatology

Official Journal of the Italian Society of Orthopaedics and Traumatology

Table 3 Multivariate linear regression analysis for the absolute difference from planned to definitively implanted component

Diff*		Coef.	Standard error	p-Value	95% CI
Dorr type	A (ref.)	1
	B	−0.194	0.112	0.084	[−0.414, 0.026]
	C	−0.263	0.164	0.110	[−0.587, 0.061]
BMI (continuous)		0.014	0.010	0.141	[−0.004, 0.033]
Templating	2D (ref.)	1
Templating	3D	−0.411	0.093	< 0.001	[−0.594, −0.227]
Constant		0.867	0.339	0.011	[0.198, 1.537]

Coef., coefficient of multivariate linear regression. The coefficient for each of the variables indicate the amount of change one could expect in the different variables (Dorr type A, 8, C, BMI, ...) given a one-unit change in the vlaue of that veriable, given that all other variables in the modelare held constant
*Absolute difference of planned (2D or 3D) implant to definitive implant