Table 4.

Multivariable linear regression analysis for anterior damage score (R² = 0.668)

Variable	Regression coefficient	95% confidence interval	Standard error	p value
Intercept	3.77		0.73	< 0.001
Age	0.01		0.01	0.831
Length of implantation	0.24	0.15 to 0.29	0.04	< 0.001
Body mass index	0.02		0.01	0.228
Reason (reference = infection)	0.02		0.11	0.829
Loosening/instability	0.85	0.54 to 1.29	0.19	< 0.001
Stiffness/miscellaneous	−0.11	−0.59 to 0.25	0.22	0.608
Design (reference = Optetrak®)	2.09		0.12	< 0.001
NexGen®	−2.08	−2.69 to −1.99	0.18	< 0.001
Genesis® II	−4.20	−4.54 to −3.67	0.23	< 0.001
Female	0.15		0.17	0.376
Femoral component flexion	0.03		0.02	0.226
Tibial posterior slope	−0.01		0.03	0.912