MDS research criteria for prodromal Parkinson's disease

Abstract

ABSTRACT 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. © 2015 International Parkinson and Movement Disorder Society

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Affiliated Institutions

• Rush University Medical Center US
• Toronto Western Hospital CA
• Institute for Neurodegenerative Disorders US
• Christian-Albrechts-Universität zu Kiel DE
• Sorbonne Université FR
• University of California, San Diego US
• Universidad de Navarra ES
• McGill University CA
• Pitié-Salpêtrière Hospital FR
• Innsbruck Medical University AT
• Mount Sinai Hospital US
• Hertie Institute for Clinical Brain Research DE
• Philipps University of Marburg DE
• Radboud University Medical Center NL
• Mayo Clinic in Arizona US
• Capital Medical University CN
• German Center for Neurodegenerative Diseases DE
• Neuroscience Research Australia AU
• Radboud University Nijmegen NL
• Penn Center for AIDS Research US
• Montreal General Hospital CA

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