Skip to main content
Open Access Publications from the University of California

UC San Diego

UC San Diego Previously Published Works bannerUC San Diego

MDS research criteria for prodromal Parkinson's disease.

  • Author(s): Berg, Daniela;
  • Postuma, Ronald B;
  • Adler, Charles H;
  • Bloem, Bastiaan R;
  • Chan, Piu;
  • Dubois, Bruno;
  • Gasser, Thomas;
  • Goetz, Christopher G;
  • Halliday, Glenda;
  • Joseph, Lawrence;
  • Lang, Anthony E;
  • Liepelt-Scarfone, Inga;
  • Litvan, Irene;
  • Marek, Kenneth;
  • Obeso, José;
  • Oertel, Wolfgang;
  • Olanow, C Warren;
  • Poewe, Werner;
  • Stern, Matthew;
  • Deuschl, Günther
  • et al.

Published Web Location

This article describes research criteria and probability methodology for the diagnosis of prodromal PD. Prodromal disease refers to the stage wherein early symptoms or signs of PD neurodegeneration are present, but classic clinical diagnosis based on fully evolved motor parkinsonism is not yet possible. Given the lack of clear neuroprotective/disease-modifying therapy for prodromal PD, these criteria were developed for research purposes only. The criteria are based upon the likelihood of prodromal disease being present with probable prodromal PD defined as ≥80% certainty. Certainty estimates rely upon calculation of an individual's risk of having prodromal PD, using a Bayesian naïve classifier. In this methodology, a previous probability of prodromal disease is delineated based upon age. Then, the probability of prodromal PD is calculated by adding diagnostic information, expressed as likelihood ratios. This diagnostic information combines estimates of background risk (from environmental risk factors and genetic findings) and results of diagnostic marker testing. In order to be included, diagnostic markers had to have prospective evidence documenting ability to predict clinical PD. They include motor and nonmotor clinical symptoms, clinical signs, and ancillary diagnostic tests. These criteria represent a first step in the formal delineation of early stages of PD and will require constant updating as more information becomes available.

Many UC-authored scholarly publications are freely available on this site because of the UC's open access policies. Let us know how this access is important for you.

Main Content
For improved accessibility of PDF content, download the file to your device.
Current View