Impact of Combined Subthalamic Nucleus and Substantia Nigra Stimulation on Neuropsychiatric Symptoms in Parkinson’s Disease Patients

Figure 8

Boxplots of combined QUIP-ICD scores: the box plot depicted on the left represents the baseline values of the three patients who withdrew. The other three box plots represent the values of the 9 PD patients who have completed the study at the three experimental time points: (1) baseline, (2) STN alone, and (3) combined STN+SNr-DBS. The numbered circles represent the single patients as listed in Table 1. For the combined QUIP-ICD score the cut-off point is ≥10.