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Table 3 Sensitivity of COP and ACC-based measures

From: ISway: a sensitive, valid and reliable measure of postural control

  COP ACC Correlation
Control PD p values Control PD p values r p
Mean SEM Mean SEM Mean SEM Mean SEM
Jerk      NA 0.241 0.023 0.394 0.053 0.0003   
Trajectory Measures
DIST 4.370 0.329 6.261 0.423 0.002 0.062 0.005 0.088 0.010 0.02 0.73 0.0001
RMS 5.141 0.371 7.329 0.552 0.003 0.073 0.006 0.106 0.012 0.02 0.74 0.0000
PATH 944.015 89.277 817.707 62.661 0.25 17.183 1.028 22.035 2.128 0.05 0.46 0.200
RANGE 32.247 2.750 40.824 3.385 0.06 0.421 0.031 0.610 0.065 0.01 0.64 0.0007
MV 7.867 0.744 6.814 0.522 0.26 1.328 0.229 1.789 0.241 0.18 0.12 0.56
MF 0.290 0.018 0.181 0.016 0.0001 0.393 0.029 0.378 0.045 0.78 0.33 0.11
Area Measures
AREA 10.699 1.581 13.138 2.121 0.36 0.002 0.0003 0.005 0.001 0.004 0.68 0.002
Frequency Measures
PWR 9870.8 1761.7 12966.1 1585.1 0.2 2.009 0.269 3.178 0.479 0.04 0.41 0.05
F50 0.410 0.015 0.298 0.012 0.00009 0.385 0.014 0.305 0.012 0.0003 0.86 0.000001
F95 1.518 0.069 0.990 0.057 0.0007 1.849 0.121 1.523 0.128 0.07 0.49 0.01
CF 0.666 0.032 0.451 0.023 0.0002 0.722 0.043 0.591 0.038 0.03 0.47 0.02
FD 0.767 0.009 0.827 0.009 0.00005 0.777 0.009 0.839 0.008 0.0003 0.89 0.000001
  1. Those measures in boldface were significantly different between untreated PD and control subjects. Correlations between COP and ACC measures are also reported.