The MDS-NMS is a 52-item rater-administered scale used to assess a wide range of non-motor symptoms in Parkinson's disease. It measures both frequency (0/never to 4/ >51% of the time) and severity (0/not present to 4/major distress or disturbance) of 13 domains (depression, anxiety, apathy, psychosis, impulse control/related disorders, cognition, orthostatic hypotension, urinary, sexual, gastrointestinal, sleep/wakefulness, pain, and other). Each question is scored by multiplying frequency x severity. All question scores for each domain are summed, and the scores for each domain are summed to provide the Total Score (range = 0-832) with the higher score indicating greater non-motor symptom burden. The higher the total score, the more progressed (i.e., worse) is the disease state.
The change/difference in scores between the baseline (average of Days 1 and 29) and end of study treatment (Day 113) are reported. A positive change in scores indicates worsening.