| | Impulsivity (BIS-11 total) | Apathy (AES-C total) |
| Demographic and disease variables | | | Age | −0.20, 0.05 | 0.46, <0.001 | Age of disease onset | −0.31, 0.002 | 0.35, <0.001 | Years of education | −0.01, 0.88 | −0.15, 0.13 | Duration of disease | 0.07, 0.48 | 0.07, 0.50 | Hoehn and Yahr | 0.12, 0.28 | 0.30, 0.02 | LEDD | 0.21, 0.04 | 0.02, 0.88 | LEDD-DA only | 0.08, 0.44 | −0.40, <0.001 | SOGS | 0.30, 0.001 | −0.06, 0.56 | UPDRS motor | −0.02, 0.84 | 0.30, 0.003 | UPDRS Complications | 0.33, 0.001 | −0.01, 0.92 |
| Psychiatric variables | | | MMSE total score | −0.04, 0.712 | −0.31, 0.02 | HADS anxiety | 0.37, <0.001 | −0.01, 0.90 | HADS depression | 0.12, 0.16 | 0.60, <0.001 | NPI total | 0.25, 0.01 | 0.47, <0.001 | NPI delusions | −0.01, 0.90 | 0.12, 0.22 | NPI hallucinations | 0.07, 0.51 | −0.00, 0.98 | NPI aggression | 0.29, 0.004 | 0.12, 0.29 | NPI depression | 0.20, 0.05 | 0.27, 0.008 | NPI anxiety | 0.19, 0.07 | 0.10, 0.32 | NPI elation | 0.23, 0.03 | −0.16, 0.12 | NPI apathy | −0.02, 0.84 | 0.82, <0.001 | NPI disinhibition | 0.23, 0.02 | −0.06, 0.53 | NPI irritability | 0.33; 0.01 | 0.12, 0.23 | NPI aberrant motor | 0.15, 0.14 | −0.21, 0.04 | NPI sleep | 0.13, 0.23 | 0.20, 0.04 | NPI appetite | 0.09, 0.38 | −0.08, 0.44 |
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