Dafsari HS, et al. - Here, the authors examined how the quality of life outcome after bilateral subthalamic nucleus (STN) deep brain stimulation (DBS) in Parkinson's disease (PD) depends on age. In all age groups, the quality of life, motor complications, and activities of daily living significantly improved after bilateral STN-DBS. However, the beneficial effect on overall quality of life was more pronounced and affected a wider range of quality of life domains in younger patients.