Table 4. Stepwise multiple regression analysis (muscle thickness entry model) for muscle strength of the quadriceps on the paretic limb (R² = 0.57).

	Partial regression coefficient	Standard error	95% Confidence interval of partial regression coefficient	Standardized partial regression coefficient	Variance inflation factor	p value
Fugl–Meyer Assessment lower extremity score	0.98	0.17	0.64, 1.32	0.58	1.03	< 0.001
Quadriceps muscle thickness, paretic limb	1.08	0.24	0.59, 1.57	0.43	1.03	< 0.001
Age	0.31	0.15	0.01, 0.61	0.21	1.06	0.044