Predictors of Health-Related Quality of Life per Parkinson’s Disease Questionnaire-Short-Form (PDQ-8) based on Linear Regression Models.

Table 2: Predictors of Health-Related Quality of Life per Parkinson’s Disease Questionnaire-Short-Form (PDQ-8) based on Linear Regression Models.

Motor Variables	p-value	Adjusted R²
UPDRS + Clinical/Demographics	0.068	0.241
H & Y + Clinical/Demographics	0.174	0.139
UPDRS	0.001^*	0.322
H & Y	0.014^*	0.189
Speech Variables	p-value	Adjusted R²
SIT + Clinical/Demographics	0.480	-0.011
Monologue + Clinical/Demographics	0.390	0.025
SIT	0.961	-0.040
Monologue	0.306	0.003
Cognitive Variable	p-value	Adjusted R²
MoCA + Clinical/Demographics	0.043^*	0.284
MoCA	0.111	0.062

*p< 0.05 Note: UPDRS: Unified Parkinson's Disease Rating Scale; H & Y: Hoehn and Yahr scale; SIT: Speech Intelligibility Test, MoCA: Montreal Cognitive Assessment.