Research Article
Quantitative Analysis of Postural Balance in Faller and Nonfaller Patients with Parkinson’s Disease
Table 3
Correlation coefficients between COP outcome measures and clinical scores.
| COP outcome measures | Directions | UPDRS III | Fear of falling score | Tinetti_balance score |
| Mean velocity (mm/s) | Overall | 0.081 | 0.330 | −0.427 | AP | 0.143 | 0.350 | −0.420 | ML | 0.012 | 0.305 | −0.409 |
| Mean distance (mm) | Overall | 0.084 | 0.231 | −0.366 | AP | 0.118 | 0.169 | −0.236 | ML | 0.009 | 0.264 | −0.464 |
| Mean frequency (Hz) | Overall | 0.074 | 0.232 | −0.135 | AP | 0.096 | 0.273 | −0.281 | ML | −0.012 | 0.053 | 0.094 |
| Peak frequency (Hz) | Overall | −0.180 | 0.182 | −0.091 | AP | 0.151 | 0.075 | 0.034 | ML | −0.013 | −0.027 | 0.230 |
| Peak power (mm2/Hz) | Overall | 0.123 | 0.336 | −0.453 | AP | 0.116 | 0.383 | −0.396 | ML | −0.006 | 0.326 | −0.397 |
| Sway area | | 0.021 | 0.283 | −0.428 |
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Note: COP, center of pressure; SD, standard deviation; AP, anterio–posterior; ML, medio–lateral; , < 0.05; , < 0.01. Bold values: P < 0.05. |