Can individual functional improvements be predicted in osteoarthritic patients after total knee arthroplasty?

Table 4 Regression analysis results of change (\(\Delta )\) in WOMAC stiffness

	Univariate analysis			Multivariate analysis
	Coefficient	P-value	95% CI	Coefficient	P-value	95% CI
Age (years)	0.009	0.324	[−0.008, 0.025]	0.001	0.850	[−0.008, 0.009]
Sex (female)	−0.062	0.816	[−0.586, 0.462]	0.499	0.000*	[0.238, 0.760]
Body mass index	0.006	0.732	[−0.030, 0.043]
Preoperative HKAA	0.003	0.804	[−0.019, 0.025]
Postoperative HKAA	−004	0.894	[−0.062, 0.054]
Cerebrovascular disease	0.123	0.541	[−0.272, 0.518]
Diabetes mellitus	−0.205	0.140	[−0.478, 0.068]	0.040	0.574	[− 0.098, 0.178]
Hypertension	0.070	0.583	[−0.179, 0.318]
Ischemic heart disease	−0.189	0.344	[−0.581, 0.202]
Chronic liver disease	0.187	0.562	[−0.446, 0.820]
Chronic kidney disease	−0.541	0.112	[−1.209, 0.127]	−0.188	0.279	[−0.527, 0.152]
Patella resurfacing	−0.021	0.872	[−0.276, 0.234]
Preoperative flexion contracture	−0.019	0.015	[−0.035, −0.004]	−0.007	0.110	[−0.015, 0.002]
Preoperative flexion angle	−0.002	0.557	[−0.010, 0.005]	−0.001	0.537	[−0.006, 0.003]
Postoperative flexion contracture	−0.018	0.498	[−0.070, 0.034]
Postoperative flexion angle	−0.010	0.078	[−0.022, 0.001]	−0.007	0.027*	[−0.014, −0.001]
Preoperative WOMAC stiffness	−0.942	0.000	[−0.976, −0.908]	−0.943	0.000*	[−0.977, −0.909]

Adjusted R² = 0.755
\(\boldsymbol{\Delta }\), Change in WOMAC scores; C.I. Confidence interval, HKAA Hip-knee-ankle angle, WOMAC Western Ontario and McMaster Universities Osteoarthritis Index
^*statistically significant at P < 0.05

ISSN: 2234-2451