Table 2.

A multiple linear regression analysis with stepwise procedure from fluoroscopic analysis and 2011 KSS

	Independent variable	β	(95% CI)	P value	R2 value
Symptoms	Max flexion	0.09	(0.01–0.17)	0.021	0.05
Satisfaction	Max flexion	0.25	(0.1–0.4)	0.0011
	Lateral Rollback	0.5	(0.01–0.92)	0.0177	0.11
Expectations	NA
Functional activities	Range of motion	0.49	(0.26–0.72)	< .0001
	Medial AP at maximum flex	1.26	(0.44–2.1)	0.003	0.18
Walking and standing	Range of motion	0.11	(0.01–0.22)	0.03
	Medial AP at maximum flex	0.59	(0.22–0.97)	0.002	0.1
Standard activities	Range of motion	0.12	(0.06–0.19)	0.0004
	Medial AP at maximum flex	0.29	(0.05–0.53)	0.02	0.13
Advanced activities	Range of motion	0.18	(0.11–0.25)	< .0001
	Medial AP at maximum flex	0.31	(0.05–0.56)	0.02	0.2
Discretionary activities	Minimum flexion	−0.15	(−0.26 to −0.03)	0.01	0.06

β regression coefficient. 95% CI 95% confidence interval. R² value, correlation coefficient