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. 2009 Jun 29;19(2):026113. doi: 10.1063/1.3147408

Table 3.

Correlations among different gait measures in 118 patients with PD. Data available at www.physionet.org∕physiobank∕database∕gaitpdb.

    Stride length Gait speed Stride time variability Swing time variability DFA fractal scaling exponent
Stride length (average) Pearson correlation 1.000 0.899a −0.262a −0.409a 0.129
  P-value   0.001 0.004 0.001 0.164
Gait speed (average) Pearson correlation 0.899a 1.001 −0.436a −0.474a 0.109
  P-value 0.001   0.001 0.001 0.239
Stride time variability (CV) Pearson correlation −0.262a −0.436a 1.001 0.677a 0.128
  P-value 0.004 0.001   0.001 0.167
Swing time variability (CV) Pearson correlation −0.409a −0.474a 0.677a 1.001 −0.042
  P-value 0.001 0.001 0.001   0.649
DFA fractal scaling exponent Pearson correlation 0.129 0.109 0.128 −0.042 1.001
  P-value 0.164 0.239 0.167 0.649  
a

Correlation is significant at the 0.01 level (two tailed).