Skip to main content

Table 1 Summary of the spatio-temporal gait parameters recorded during the mixed route path in healthy controls (CTR) and subjects with PD, grouped by intended velocity of execution (these metrics are calculated including both gait and turning, except for the Mean turning duration). Results of the Repeated Measure ANOVA comparing trials grouped by intended and matched speed are reported in the far-right columns. Statistically significant differences are bolded

From: The quality of turning in Parkinson’s disease: a compensatory strategy to prevent postural instability?

Route path   Slow Preferred Fast   Intended speed Matched speed
Measure Mean STD Mean STD Mean STD   Group Velocity Interaction Group Velocity Interaction
Total length of the COM trajectory (m) CTR 17.5 1.2 17.3 0.9 15.2 1.1 F-value 9.18 76 0.3 18.55 19.9 1.6
PD 16.3 1.0 16.3 1.1 14.3 1.2 p-value 0.008 <0.00001 0.7 0.0002 <0.00001 0.2
Total duration
(s)
CTR 37.3 7.0 33.0 4.7 21.9 4.1 F-value 0.23 58 0.6 2.4 396 6.5
PD 34.7 8.9 32.9 6.5 22.0 3.2 p-value 0.6 <0.00001 0.6 0.13 <0.00001 0.004
Mean velocity of the trial (m/s) CTR 0.49 0.07 0.53 0.07 0.7 0.09 F-value 0.7 56 2 0.3 786 11.4
PD 0.50 0.1 0.51 0.09 0.6 0.1 p-value 0.4 <0.00001 0.1 0.6 <0.00001 0.0002
Mean turning
duration (s)
CTR 1.5 0.02 1.4 0.01 1.5 0.01 F-value 4.1 6.2 0.02 0.6 1 0.9
PD 1.6 0.01 1.5 0.12 1.6 0.01 p-value 0.06 0.006 1 0.4 0.4 0.4
Mean step length (m) CTR 0.42 0.04 0.42 0.04 0.48 0.05 F-value 2.8 26 0.2 12 15.3 0.68
PD 0.39 0.06 0.39 0.07 0.45 0.08 p-value 0.1 <0.00001 0.8 0.002 <0.00001 0.51
CoV step length CTR 0.27 0.04 0.28 0.03 0.30 0.04 F-value 9.5 4.6 0.3 10.9 1.96 0.07
PD 0.31 0.09 0.34 0.08 0.34 0.06 p-value 0.008 0.02 0.7 0.003 0.15 0.93
Total number of steps CTR 59 16 56 7 46 7 F-value 0.5 13 0.3 1.15 11.5 0.08
PD 55 17 55 13 44 11 p-value 0.5 0.0001 0.8 0.29 0.0002 0.92
Mean step duration (s) CTR 0.64 0.09 0.60 0.05 0.49 0.08 F-value 0.03 46 0.3 0.14 19.5 1.14
PD 0.64 0.13 0.60 0.08 0.50 0.07 p-value 0.9 <0.00001 0.8 0.71 <0.00001 0.33
CoV step duration CTR 0.38 0.12 0.36 0.05 0.34 0.07 F-value 10 0.3 1.9 6.15 0.26 1.09
PD 0.29 0.08 0.29 0.07 0.33 0.06 p-value 0.007 0.7 0.2 0.02 0.7 0.35
DS time (% gait cycle) CTR 18.0 8.3 16.6 4.4 16.3 3.6 F-value 0.05 0.5 1.5 0.06 0.84 0.03
PD 16.2 5.4 15.9 3.1 18.0 3.6 p-value 0.8 0.6 0.2 0.81 0.44 0.97
  1. Abbreviations: COM center of mass, CoV coefficient of variation, DS double support