Table 3. Correlation coefficients between quadriceps muscle strength of the non-paretic limb and each variable.

Variable	Correlation coefficient with quadriceps muscle strength of the non-paretic limb (Kendall’s Tau-b)	p value
Age	−0.200	0.043
Sex	−0.305	0.010
Body mass index	0.125	0.203
Time since stroke	−0.097	0.323
Quadriceps muscle thickness, non-paretic limb	0.422	< 0.001
Quadriceps echo intensity, non-paretic limb	−0.372	< 0.001