Predictors of communicative participation per the Communicative Participation Item Bank (CPIB) based on Linear Regression Models.

Table 4: Predictors of communicative participation per the Communicative Participation Item Bank (CPIB) based on Linear Regression Models.

Motor Variables	p-value	Adjusted R²
UPDRS + Clinical/Demographics	0.377	0.031
H & Y + Clinical/Demographics	0.475	-0.009
UPDRS	0.085	0.079
H & Y	0.720	-0.035
Speech Variables	p-value	Adjusted R²
SIT & Clinical Demographics	0.441	0.005
Monologue & Clinical Demographics	0.010*	0.402
SIT	0.782	-0.040
Monologue	0.001**	0.346
Cognitive Variable	p-value	Adjusted R²
MoCA & Clinical Demographics	0.450	0.001
MoCA	0.647	-0.032

*p< 0.05; **p < .01 Note: UPDRS: Unified Parkinson's Disease Rating Scale; H & Y: Hoehn and Yahr scale; SIT: Speech Intelligibility Test; MoCA: Montreal Cognitive Assessment.