Anxiety disorders are seen in approximately 40% of patients with PD (109). Despite their frequent occurrence and contribution to morbidity and caregiver burden (11), anxiety symptoms in PD have received relatively little attention, perhaps because they overlap with symptoms of depression, PD, and medication effects, and are thus difficult to measure (110). The relationship between anxiety and cognition in PD has received virtually no attention. Ryder et al. (111) found that self-reported symptoms of anxiety, but not depression, were related to cognitive functioning in a small sample of male patients with PD. Self-reported trait anxiety was negatively related to performance on a neuropsychological screening battery, accounting for approximately 70% of the variance. The authors posit that anxiety may partly explain the association between depression and cognition in PD, although replication of their findings and additional large-scale studies are needed.
Was this article helpful?