Quantitative Analysis of Postural Balance in Faller and Nonfaller Patients with Parkinson’s Disease

Table 2

Comparison of postural balance variables between faller and nonfaller patients.

COP outcome measures	Directions	Faller; (n = 32, men = 14); Mean (SD)	Nonfaller; (n = 32, men = 14); Mean (SD)	Significance; ( value)
Mean velocity (mm/s)	Overall	17.41 (9.45)	11.67 (6.12)	0.01
	AP	12.32 (5.94)	8.87 (5.40)	0.02
	ML	9.58 (6.95)	5.75 (2.66)	0.01
Mean distance (mm)	Overall	7.50 (3.98)	5.67 (1.92)	0.02
	AP	4.96 (2.39)	4.07 (1.49)	0.08
	ML	4.54 (2.93)	3.04 (1.45)	0.01
Mean frequency (Hz)	Overall	0.40 (0.17)	0.35 (0.16)	0.26
	AP	0.48 (0.19)	0.43 (0.26)	0.31
	ML	0.41 (0.22)	0.37 (0.11)	0.33
Peak frequency (Hz)	Overall	0.40 (0.09)	0.37 (0.07)	0.19
	AP	0.37 (0.10)	0.35 (0.07)	0.30
	ML	0.36 (0.11)	0.34 (0.07)	0.29
Peak power (mm^2/Hz)	Overall	1031.86 (1130.21)	497.42 (347.01)	0.01
	AP	1583.28 (1163.87)	747.42 (351.51)	P < 0.001
	ML	1907.72 (2322.22)	843.40 (1376.53)	0.30
Sway area		823.23 (1235.08)	337.20 (192.06)	0.04

Note: COP, center of pressure; SD, standard deviation; AP, anterio–posterior; ML, medio–lateral. Bold values: P < 0.05.