Fourier-Based Footfall Placement Variability in Parkinson’s Disease

Table 3

Gait variability parameters (CV) of controls and low and high Parkinson’s disease (mean±SD).

	Controls	Low PD	High PD	F (2, 62), P
FPV	2.86±1.06	3.87±1.67	6.10±1.84	21.159,<.001	0.41
Step width CV (%)	3.94±1.80	6.38±4.21	7.76±4.97	6.872,<.01	0.18
Step length CV (%)	4.06±2.00	7.29±5.44	10.73±10.08	7.422,<.001	0.19
Step time CV (%)	3.40±1.50	5.09±2.65	8.57±5.78	12.886,<.001	0.29

a, b, and c denote specific group differences from post hoc analysis. p<.05 difference between low PD and controls. p<.05 difference between high PD and controls. p<.05 difference between PD groups. FPV means Fourier-based footfall placement variability. CV means coefficient of variance.