Table 2.

iTUG and iSway measures with highest correlation (r) with PD diagnosis and disease severity.

Diagnosis Set				Disease Severity Set
iTUG	r*	iSway	r*	iTUG	r*	iSway	r*
Turn To Sit: Peak Turn Velocity	−0.30	Path length	0.18	Gait: Stride Length [CoV]	0.46	Centroidal frequency (AP)	0.40
Gait: RoM Trunk horizontal [CoV]	−0.26	High frequency power (AP)	0.18	Gait: Stride Length [Mean]	−0.43	Path length	0.39
Gait: Stride Length [Mean]	−0.24	Mean distance (ML)	0.19	Turn To Sit: Duration	0.47	Jerk (ML)	0.39
Turn: Number of steps [Mean]	0.23	Normalized jerk (AP)	0.17	Gait: RoM Knee [Mean]	−0.42	Mean frequency	0.40
Gait: Peak Swing Velocity R [CoV]	0.21	Path length (AP)	0.18	Gait: Stride Velocity [Mean]	−0.40	Median frequency (AP)	0.39
Turn: Duration [Mean]	0.21	Mean frequency	0.15	Gait: RoM Shank L [Mean]	−0.40	Normalized jerk	0.38
Turn To Sit: RoM Trunk	−0.23	Normalized jerk	0.14	Gait: Stride Velocity [CoV]	0.40	Mean distance (ML)	0.33
Gait: RoM Knee [Mean]	−0.21	Range of acceleration	0.14	Total Duration	0.41	Path length (AP)	0.30
Gait: RoM Knee R [Mean]	−0.21	Total sway area	0.15	Gait: RoM Shank [CoV]	0.38	Centroidal frequency	0.32
Turn: Peak Velocity [Mean]	−0.20	Mean velocity (ML)	0.14	Gait: RoM Knee L [Mean]	−0.37	Frequency dispersion (ML)	−0.30

CoV=covariance, AP=anteroposterior, ML=mediolateral

^*average correlation coefficient over 10 randomization trials