Table 1 Association between the change in phase coordination index (PCI) and changes in other measures of gait*
Healthy subjectsPD patients
Gait speed−0.16 (0.603)−0.28 (0.227)
Stride time variability0.31 (0.306)0.49 (0.023)
Swing time variablity0.54 (0.058)0.50 (0.020)
Gait asymmetry0.02 (0.943)0.33 (0.139)
  • Entries are Spearman’s ρ (p-values).

  • *Relative changes are defined as the ratio between the value in the dual task condition and the value in the usual walking condition. Significant correlations are in bold type.