Parkinson's disease and predictors of impulse control disorders in MMPI-2

This was a case control study involving 46 patients suffering from Parkinson disease (PD); 13 with impulse control disorder (ICD) and 33 without ICD; and 56 controls. The personality traits in these groups were analyzed using the Minnesota Multiphasic Personality Inventory-2 (MMPI-2). 46 patients with PD and 56 control group subjects were included into study. ICD were identified in 13 patients from PD group. There were higher scores than pathological threshold (65) in four domains of MMPI-2 Clinical scales: D (Depression), Pt (Psychastenia), Sc (Schizophrenia) and SI (Social introversion) in PD patients with ICD; but there were not statistical difference in any of these scales in comparison with the group of PD patients without ICD. In the case of MMPI-2 Subscales and Content scales there were higher scores than pathological threshold in eight domains of MMPI-2: SOD (Social Discomfort), PD4 (Psychopatic deviate - social alienation), PA1 (Paranoia - persecutory ideas), SC1 (Schizophrenia), PA_O (Paranoia - subtle), MA_O (Hypomania - obvious), SI1 (Syness/Self-Consciousness), SI3 (Alienation self and others) and Ho (Hostility), but there were statistical differences only in one of these domains in comparison with the PD patients without ICD: SI3 (alienation self and others). There was earlier onset of the disease and higher dose of levodopa in PD patients with ICD than in PD patients without ICD.

Supported by project IGA MZ ČR NS 10301-3/2009