Depression in Early Parkinson's Disease

Impact on Motor Symptoms and Quality of Life

The American Academy of Neurology suggests that depression is a significant predictor of motor symptom severity in patients with Parkinson's disease, with every increase in depression severity correlating with higher UPDRS scores, weaker motor function, and decreased daily activity ability 1, 2
Depression contributes most significantly to quality of life scores, even more than motor symptoms, with anhedonia being the specific depressive symptom that most contributes to decreased quality of life 1, 2
The European Society for Clinical Nutrition and Metabolism recommends that nutritional status be monitored, as it correlates inversely with quality of life, particularly in the domains of mobility and emotional well-being, with depression being a predictor of malnutrition 2, 3

The American Academy of Neurology recommends that patients with significant concerns about depression risk undergoing DBS should consider GPi stimulation over STN stimulation, as evidence suggests GPi DBS has a lower risk of depression 1, 3, 4
The European Society for Clinical Nutrition and Metabolism suggests that nutritional monitoring is essential, as nutritional status correlates inversely with quality of life and mobility, with nutrition and vitamin assessments recommended at least annually 2, 3