Table 2 Demographic and clinical features of early PD patients in the two neuropsychiatric clusters and in those with no or mild neuropsychiatric symptoms
No/mild symptomsMood clusterApathy clusterStatistic*p Value
Age67.5 (9.0)69.0 (9.1)75.1 (8.7)1.50.24
Men/women (n)90/587/33/11.10.3
Education (years)11.0 (3.3)10.0 (4.0)8.4 (1.8)1.60.21
MMSE score27.9 (2.4)28.0 (2.1)24.5 (1.7)4.00.02
UPDRS motor score22.8 (11.2)31.7 (9.7)35.3 (11.5)5.10.007

  • Values are mean (SD) unless otherwise indicated.

  • *One way ANOVA.

  • MMSE, Mini-Mental State Examination Scale; PD, Parkinson’s disease; UPDRS motor, Unified Parkinson’s Disease Rating Scale, motor subscale.