Table 3.

Simple and multiple linear regression of HSS-post score

	Simple linear regression			Multiple linear regression
	β	95% CI	p	β	95% CI	p
Age	0.043	− 0.179 to 0.265	n.s
BMI	− 0.599	− 1.096 to − 0.102	0.019	− 0.166	− 0.742 to 0.410	n.s
Sex	− 0.361	− 2.551 to 1.828	n.s
AMR	− 2.587	− 4.054 to − 1.120	0.001	− 2.223	− 3.990 to − 0.455	0.014
Side	0.727	− 1.458 to 2.912	n.s
KSS total-pre	0.046	− 0.005 to 0.097	0.078	0.018	− 0.105 to 0.141	n.s
HSS-pre	0.115	− 0.013 to 0.243	0.078	0.060	− 0.248 to 0.368	n.s

CI confidence interval, n.s nonsignificant, BMI body mass index, AMR adipose to muscle area ratio, KSS score the Knee Society Score, HSS score the Hospital for Special Surgery knee score