Table 3.

Demographic and clinical characteristics of 616 patients with Parkinson's Disease (PD) that are independently associated with screening positive for dementia on the Montreal Cognitive Assessment (MoCA-C) scale^a

Characteristic	p-value	Odds ratio (95%CI)
Age	<0.001	1.06 (1.03-1.08)
Male	0.045	0.60 (0.36-0.99)
Years of education	<0.001	0.80 (0.75-0.85)
Score on the motor symptoms section of the UPDRS	<0.001	1.06 (1.04-1.08)

UPDRS, United Parkinson's Disease Rating Scale

^aConsidering all variables that were significant in the univariate analysis (see Table 2), the multivariate logistic regression analysis first forced age, gender, and years of education into the model and then used a forward stepwise method to identify other significant variables. The Nagalkerke R-squared for the final model was 0.406.