Wearable Sensors Measure Ankle Joint Changes of Patients with Parkinson’s Disease before and after Acute Levodopa Challenge

Table 3

Correlation between objectively and subjectively acquired motor improvement in PD patients.

	rs
H-Y stage vs OFF HS	−0.419	0.024
H-Y stage vs OFF 3-PF	−0.287	0.131
H-Y stage vs OFF 4-DF	−0.229	0.231
Stride length improvement vs HS improvement	0.616	<0.001
Stride length improvement vs 3-PF improvement	0.639	<0.001
Stride length improvement vs 4-DF improvement	0.357	0.058
Rigidity item improvement vs HS improvement	0.389	0.037
Rigidity item improvement vs 3-PF improvement	0.373	0.046
Rigidity item improvement vs 4-DF improvement	0.141	0.465

H–Y stage: Hoehn–Yahr stage. Rigidity items: UPDRS motor subsection item 22. HS: heel strike angle. 3-PF: 3-plantarflexion angle of ankle joints. 4-DF: 4-dorsiflexion angle of ankle joints. ; .