Quantitative Analysis of Postural Instability in Patients with Parkinson’s Disease

Table 2

Limit of stability results.

Group	HCs	H&Y I	H&Y II	H&Y III	H&Y IV	p value
						I vs. HCs	II vs. HCs	III vs. HCs	IV vs. HCs
Time to complete test (s)	73.90 ± 2.96	78.67 ± 4.44	83.58 ± 10.54	82.21 ± 13.02	94.50 ± 9.77	0.280	0.021	0.040	0.000
Endpoint excursion (%)	84.22 ± 4.69	74.15 ± 12.42	64.91 ± 19.66	59.50 ± 20.72	50.42 ± 15.14	0.188	0.008	0.001	0.000
FW	65.63 ± 1.37	65.20 ± 0.74	53.88 ± 7.35	46.92 ± 15.34	36.24 ± 15.78	0.803	0.013	0.000	0.000
FW-RT	70.67 ± 0.89	68.71 ± 1.98	65.24 ± 4.29	55.11 ± 3.21	47.11 ± 10.35	0.383	0.012	0.000	0.000
RT	75.87 ± 2.97	75.77 ± 1.93	72.92 ± 12.29	69.61 ± 14.50	57.47 ± 4.87	0.906	0.733	0.105	0.012
BW-RT	99.92 ± 0.33	99.90 ± 0.10	95.25 ± 5.09	73.98 ± 7.06	51.36 ± 7.51	0.978	0.044	0.000	0.000
BW	100.53 ± 0.66	99.95 ± 0.10	86.61 ± 14.30	74.87 ± 8.52	48.98 ± 17.61	0.901	0.002	0.000	0.000
BW-LT	100.51 ± 1.09	100.56 ± 0.51	90.57 ± 6.35	70.19 ± 16.74	38.71 ± 5.99	0.971	0.019	0.000	0.000
LT	80.15 ± 0.99	80.00 ± 0.02	75.82 ± 15.64	56.21 ± 23.13	45.62 ± 7.57	0.982	0.488	0.000	0.000
FW-LT	80.62 ± 0.84	80.73 ± 1.70	76.24 ± 7.33	65.25 ± 5.00	41.18 ± 3.85	0.959	0.034	0.000	0.000

H&Y = Hoehn–Yahr stage, HC = healthy control, FW = forward, BW = backward, RT = right, LT = left, FW-RT = forward-right, FW = forward-left, BWRT = backward-right, BW-LT = backward-left. Data are presented as the mean ± standard deviation. Red numbers indicate significance.