Objective: To investigate the diagnostic value of the MDS research criteria for the detection of the prodromal phase of Parkinson’s disease (PD) in the general population.

Background: The Movement Disorder Society developed research criteria for the detection of the prodromal phase of Parkinson’s disease (PD). Accurate identification of this phase is essential for early interventions.

Method: Lifelines is an ongoing cohort study of 167,000 participants from the general population of the Northern Netherlands. 160 participants self-reported to have developed PD during three rounds of follow-up of five years each. Data was available to infer six out of eleven risk markers, and six out of twelve prodromal markers. We retrospectively compared the criteria in the prodromal stage of a group of 160 ‘converters’ with 320 age- and sex-matched controls.

Results: The overall incidence rate of PD was 0.20 (95% CI: 0.049 – 0.36) per 1.000 person-years, increasing with age and rates were higher in men. The median probability for prodromal PD in PD-converters was 1.29% (interquartile range: 0.46 – 2.9), compared to 0.83% (0.39 – 1.8) for controls (P=0.014). The MDS set of criteria for prodromal PD had an ROC-AUC of 0.577, and was therefore not sufficient to adequately predict conversion to PD.

Conclusion: We were unable to predict conversion to PD in the general population using a selection of the prodromal PD research criteria. Ancillary investigations are required to improve diagnostic accuracy of the criteria, but most are precluded from large-scale use. Strategies including olfactory tests or alpha-synuclein seeding amplification assays may improve detection of prodromal PD in the general population. We are currently analyzing the serum samples of the participants with an alpha-synuclein seeding amplification assay [2]

References: [1] Berg D, et al. MDS research criteria for prodromal Parkinson’s disease. Vol. 30, Movement Disorders. John Wiley and Sons Inc; 2015. p. 1600–11.
[2] Kluge A. Detection of neuron-derived pathological α-synuclein in blood. Brain. 2022

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MDS Abstracts - https://www.mdsabstracts.org/abstract/prodromal-parkinsons-disease-in-the-general-population/