A multi center comparative study of impulse control disorder in Latin American patients with Parkinson disease

Objectives: Impulse control disorder (ICD) is a common adverse effect in patients with Parkinson disease who receive dopamine agonists; however, other factors are involved in itsmanifestations. To study the frequency and factors involved in the development of this adverse effect in a Latin American population, we conducted a cross-sectional multicenter study. Methods: Two hundred fifty-five patients in 3 Latin American centers were evaluated by examination and application of scales (Unified Parkinson's Disease Rating Scale, Questionnaire for Impulsive-Compulsive Disorders in Parkinson's Disease-Rating Scale, Hoehn and Yahr, Clinical Impression of Severity Index for Parkinson's Disease). Results: Of the patients, 27.4% had ICD, most of whom were on dopamine agonists. Other associated risk factors included a younger age at onset of Parkinson disease, moderate symptoms, a shorter evolution of the clinical manifestations, rapid eye movement (REM) sleep disorder behavior, and the consumption of tea, mate, and alcohol. Conclusions: The frequency of ICD is higher in Latin America than in Anglo-Saxon populations. Consuming tea and mate, in addition to the use of dopamine agonists, is a factor that may demonstrate a genetic link that predisposes patients to the establishment of an ICD.