MDS-UPDRS: 4-part assessment of the multiple clinical disabilities of Parkinson's Disease. Part I (13 items; Score 0-52) examines non-motor experiences, Part II (13 items; Score 0-52) examines motor experiences, Part III (33 items; Score 0-132) examines the cardinal motor disabilities and Part IV (6 items; Score 0-24) examines motor complications. Each Part has 0-4 ratings, where 0 (no problems) to 4 (severe problems) and scores for each part are summed to calculate the total score which ranges from 0-260. Higher scores represent worse outcomes for each part and total score.

Overall Number of Participants Analyzed represented by initial number analyzed at study visit Day 60; Number may differ for each Part (1-4) due to availability of score data. Evaluable Population: all subjects in the safety population who complete at least the MDS-UPDRS assessment at the Study Day 60 visit. Evaluable population will be used to analyze MDS-UPDRS endpoint.

PDQ-39 is a patient-reported outcome designed to address aspects of functioning and well-being for those affected by PD. Each of the 39 items is rated using a 5 point Likert scale with 0 for never having difficulties/problems and 4 for always having difficulties/problems. The sum score of the 39 items will be calculated and used for analysis, with scores ranging from 0-156. Higher scores indicate worse outcomes.

Overall Number of Participants Analyzed represented by number analyzed at study visit Day 60. Safety Population: all subjects who sign informed consent form, complete baseline assessments, receive at least 1 dose of XADAGO. Safety population used to analyze all efficacy endpoints except MDS-UPDRS.

MoCA is a 30-point, 1-page test designed to assess several cognitive domains, including visuospatial abilities (5 points), naming (3 points), attention (6 points), language (3 points), abstraction (2 points), delayed recall (5 points), and orientation to time and place (6 points). The total score ranges from 0 to 30, with higher scores indicating better performances.

Overall Number of Participants Analyzed represented by number analyzed at study visit Day 60. Safety Population: all subjects who sign informed consent form, complete baseline assessments, receive at least 1 dose of XADAGO. Safety population used to analyze all efficacy endpoints except MDS-UPDRS.

TSQM-9 consists of 9 questions to assess patients' satisfaction with medication using a range of responses from 1 (extremely dissatisfied) to (7 extremely satisfied). This patient reported outcome provides scores on three parts: effectiveness, convenience, and global satisfaction. The sum of the 9-questions will be calculated and used for analysis. The total score ranges from 0 to 63, with higher scores indicating better treatment satisfaction.

Overall Number of Participants Analyzed represented by number analyzed at study visit Day 60. Safety Population: all subjects who sign informed consent form, complete baseline assessments, receive at least 1 dose of XADAGO. Safety population used to analyze all efficacy endpoints except MDS-UPDRS.

CGI-C is a 7-point scale depicting a Principal Investigator or certified Health Care Professional designee rating of the patient's overall improvement using a range of responses from a minimum of 1 (very much improved) to a maximum of 7 (very much worse).

PGI-C is a 7-point scale depicting a patient's rating of overall improvement using a range of responses from 1 (very much improved) to 7 (very much worse).

Participants Analyzed does not match the Participant Flow because some patient data was not captured for the visit. Safety Population: all subjects who sign informed consent form, complete baseline assessments, receive at least 1 dose of XADAGO. Safety population used to analyze all efficacy endpoints except MDS-UPDRS.