Table 3.

Relationships between tonic and phasic chin muscle RSWA scores to gait measures within the PD participants (n = 41). Spearman’s coefficients (ρ) are reported

	Tonic Chin EMG	Phasic Chin EMG	Phasic Leg EMG
Speed	−0.257	−0.505**	−0.299
Normalized speed (%LL/s)	−0.157	−0.357*	0.366*
Cadence	−0.358*	−0.377*	−0.170
Normalized step length MA (%LL)	−0.101	−0.273	−0.333*
Normalized step length LA	−0.079	−0.346	−0.374*
Step width MA	−0.020	−0.104	0.003
Step width LA	−0.064	−0.042	−0.011
Step time MA	0.270	0.317*	0.157
Step time LA	0.407**	0.409**	0.197
Mean double support (%GC)	0.215	0.157	0.159
Mean step length CV (%)	0.124	0.320*	0.262
Mean step width CV (%)	0.079	0.109	0.033
Mean step time CV (%)	0.259	0.507**	0.378*

^*p < 0.05,

^**p < 0.01,

^***p < 0.001. %LL, percent leg length; %GC, percent of the gait cycle; CV, coefficient of variability; MA, more affected side; LA, less affected side.