Table 4.

Correlation between balance parameters of static and dynamic stability and tandem gait steps/grade, JOA subscore and Nurick scale.

Category	Variable	Tandem gait steps (0–10)		Tandem gait grade (0–4)		JOA subscore (lower limb) (0–4)		Nurick scale (0–5)
		Rho	p-value	rho	p-value	rho	p-value	rho	p-value
mCTSIB	Firm, eye-opened	− 0.510	< 0.001**	− 0.545	< 0.001**	− 0.346	0.006**	0.459	< 0.001**
	Firm, eye-closed	− 0.570	< 0.001**	− 0.639	< 0.001**	− 0.538	< 0.001**	0.471	< 0.001**
	Foam, eye-opened	− 0.589	< 0.001**	− 0.639	< 0.001**	− 0.629	< 0.001**	0.750	< 0.001**
	Foam, eye-closed	− 0.607	< 0.001**	− 0.680	< 0.001**	− 0.632	< 0.001**	0.718	< 0.001**
LOS	Reaction time, s	0.280	0.037*	0.208	0.124	0.157	0.239	− 0.394	0.004**
	Speed, deg/s	0.281	0.031*	0.262	0.045*	0.160	0.217	− 0.256	0.059
	End-point excursion, %	0.513	< 0.001**	0.486	< 0.001**	0.335	0.008**	− 0.559	< 0.001**
	Maximal excursion, %	0.525	< 0.001**	0.487	< 0.001**	0.340	0.007**	− 0.551	< 0.001**
	Directional control, %	0.608	< 0.001**	0.588	< 0.001**	0.410	0.001**	− 0.669	< 0.001**
RWS	Mediolateral sway
	Speed, deg/s	0.441	< 0.001**	0.379	0.003**	0.327	0.010*	− 0.385	0.004**
	Directional control, %	0.592	< 0.001**	0.561	< 0.001**	0.501	< 0.001**	− 0.543	< 0.001**
	Anterioposterior sway
	Speed, deg/s	0.466	< 0.001**	0.416	0.001**	0.386	0.002**	− 0.469	< 0.001**
	Directional control, %	0.591	< 0.001**	0.678	< 0.001**	0.524	< 0.001**	− 0.661	< 0.001**

*p < 0.05, **p < 0.01.

rho = Spearman’s correlation coefficient.

JOA Japanese Orthopedic Association, mCTSIB modified clinical test of sensory integration and balance, LOS limits of stability, RWS rhythmic weight shift.