Objective: Freezing of gait (FOG) can be a debilitating symptom in Parkinson's disease (PD) and has a major impact on quality of life. Anxiety may be associated with FOG in PD, but it is unknown whether other mood symptoms also contribute. Furthermore, the relationship between FOG and global cognition is not clearly defined. We examined whether anxiety, depression, apathy, or global cognition were unique predictors of FOG in patients with PD. Method: A convenience sample of 147 PD patients was classified as either having FOG (n = 35) or no FOG (n = 112) based on their responses on the Unified Parkinson's Disease Rating Scale (UPDRS). Logistic regression was used to predict FOG (present or absent) based on scores from the state scale of the State Trait Anxiety Inventory (STAI-S), the Geriatric Depression...

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