A: The percentage of patients who screened positive for depressive symptoms at the initial visit (left) and considering all clinic visits (right). Post‐hoc analysis indicates differences between subgroups (shown with respective P values). B: The severity of depressive symptoms across different parkinsonian disorders at the initial visit. PD, Parkinson's disease; CBD, corticobasal degeneration; DLB, dementia with Lewy bodies; MSA, multiple system atrophy; PSP, progressive supranuclear palsy.