Differential contribution of apathy and depression on cognitive functioning.

∧< .05,
*< .005, in bold the significant value of the predictors.
Regression analysis on the test scores that differentiated PD-NA and
PD-A. The variables entered into the analysis were: AES score,
HAMD-17, age, education, disease duration and LED. The analysis was
performed on the entire sample of patients. Model summary reports
the R squared and the results of the ANOVA test for the different
dependent variables. We report the beta values only for the two
predictors of interest (AES score and HAMD-17 score).