Skip to main content

Table 2 Smoothness measures

From: Movement smoothness during a functional mobility task in subjects with Parkinson’s disease and freezing of gait – an analysis using inertial measurement units

  Subjects with PD Healthy Controls Effect Size & p-value
n = 31 n = 6 PD vs HC
SPARC Acc L total −6.34 (− 6.98, − 5.70) −4.23 (− 5.30, − 3.15) 1.52 (0.007*)
Acc L V − 5.07 (− 5.93, − 4.21) −2.68 (− 3.37, − 1.99) 1.59 (0.019*)
Acc L ML −5.80 (− 6.30, − 5.30) − 4.84 (− 6.00, − 3.67) 0.77 (0.115)
Acc L AP −3.25 (− 3.63, − 2.88) −2.35 (− 2.69, − 2.00) 1.33 (0.041*)
Acc A total −4.99 (− 5.59, − 4.39) −3.05 (− 3.37, − 2.73) 1.99 (0.007*)
Acc A V − 3.16 (− 3.60, − 2.72) −2.14 (− 2.37, − 1.91) 1.44 (0.046*)
Acc A ML −4.52 (− 5.17, − 3.86) −2.90 (− 3.17, − 2.62) 1.58 (0.035*)
Acc A AP −4.28 (− 4.81, − 3.75) −2.90 (− 3.35, − 2.45) 1.46 (0.028*)
TUG time (s)   14.04 (12.34, 15.74) 9.15 (7.83, 10.47) 1.66 (0.016*)
  1. Data are mean and 95% confidence interval
  2. Abbreviations. PD Parkinson Disease, HC Healthy controls, Acc L linear acceleration, Acc A angular acceleration, V vertical, ML mediolateral, AP anteroposterior
  3. *p < 0.05