*3.2. Postural Features*

The trunk and thigh angles, but not the shank angle, were significantly altered in both PDNF and PDF patients compared with HCs (Table 4). Parkinsonian patients showed increased forward trunk bending associated with a reduced thigh angle. The trunk was more flexed in PDF patients than in PDNF patients, although this difference did not reach statistical significance. The thigh angle showed a negative average value only in the PDF group.

**Table 4.** Postural angles were computed shortly before the gait initiation execution (during a 1 s window before the onset of the anticipatory postural adjustments). Data are shown as mean (standard deviation). Abbreviations: HC, healthy controls; PDF, Parkinson's disease with freezing of gait; PDNF, Parkinson's disease with no freezing of gait.


Dunn's test, significant *p*-value after Bonferroni correction: # HC vs. PDNF, <sup>+</sup> HC vs. PDF.
