We read with interest Weintraub and colleagues' cross-sectional study of 4 impulse control disorders (ICDs) in Parkinson disease.1 The point prevalence for ICDs was 13.6%. Impulse control disorders were more common in dopamine agonist (DA)–treated patients (17.1%) than all other cases (6.8%; odds ratio, 2.72; P < .001). Known associations with ICDs were found, eg, men, younger onset age, being unmarried, and current smoking. Two findings were new and require detailed consideration.
Grosset DG, Cardoso F, Lees A. Dopamine Agonists vs Levodopa in Impulse Control Disorders. Arch Neurol. 2011;68(4):544-546. doi:10.1001/archneurol.2011.41