Analyzing the Parkinson's disease clinical trial pipeline to facilitate patient collaboration in research.


Parkinson's disease (PD) is a progressive neurological disorder affecting an estimated 1 to 1.5 million people in the United States and 4 to 7 million people worldwide.  

The goal of is to provide Parkinson's patients, families, researchers, health care providers, and other interested members of the PD community with analysis of ongoing PD clinical trials and observational studies throughout the world in order to:

  • understand the types of trials underway and where they are in the pipeline,
  • highlight the most promising avenues of research (e.g., particular disease modifying therapies, symptomatic treatments)
  • uncover roadblocks in the trial process and ways to address them (e.g., improving recruitment methods, enhancing clinical trial best practices),
  • promote accurate and timely sharing of trial information for ongoing and completed trials (e.g., within,
  • facilitate greater collaboration between Parkinson's patients, families, researchers, and physicians to accelerate progress towards a cure.

Clinical Trial Data Source

Clinical trial and study data on are obtained from the database,a web-based resource that provides information to the public, free of charge, on publicly and privately supported clinical studies on a wide range of diseases and conditions.  Launched in February 2000, is maintained by the National Library of Medicine at the National Institutes of Health (NIH). See overview

Clinical trial data available on is submitted directly by each study's sponsor or principal investigator.  To date, over 240,000 studies from around the world have been listed on  This includes over 1700 Parkinson's disease trials/studies, with over 500 of these currently active.  


PDTrialTracker Analysis

PDTrialTracker monitors and analyzes Parkinson's disease clinical trials and observational studies that are in-progress, that is, i) currently recruiting, ii) active, but not yet recruiting, iii) enrolling by invitation or iv) active, not recruiting.  The analysis is presented in tabular and graphical formats to provide greater insight into the type and focus of trials underway. 

High-level charts of the trial pipeline provide overall views of the number, types and locations of trials being conducted.  You can drill-down into specific trials of interest through pre-set  trial filters, such as trial type (interventional, observational), trial phase, recruiting status, and therapy focus.  Direct links to interactive maps on allow you to easily view filtered trial sets by country and state and to zoom in on individual trial details such as study methodology, inclusion/exclusion criteria, and study contact and location information. 

These types of filtered data views can yield insights and suggest action plans to help streamline the trial process.

Taking Action

Insights and action plans developed through use of PDTrialTracker can foster further collaboration between patients and researchers. Greater awareness of ongoing research can enable patient advocates to work more closely with researchers on study design, funding, and recruitment efforts, thereby helping to accelerate the path to a cure. 

See interventional trials page and observational studies page for more in-depth analysis of the PD clinical trial pipeline.

See recruiting trials page to view recruiting trial information via interactive map tools.

See collaboration page to learn about opportunities for patient/researcher collaboration.


Studies with multiple locations are included in each region containing locations.

Overview of

Active PD Clinical Trials Worldwide


Location of 569 active PD trials worldwide

(map source:, 10/7/17)



Location of 261 active PD trials in the U.S.

(map source:, 10/7/17)

Note:  Active PD trials include those:

i) currently recruiting, ii) not yet recruiting, iii) enrolling by invitation and

iv) in-progress, not recruiting.