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Parkinson's Disease, Diagnostic Observations (PADDO) (PADDO)

This study is currently recruiting participants. (see Contacts and Locations)
Verified March 2016 by Marjolein Aerts, Radboud University
Information provided by (Responsible Party):
Marjolein Aerts, Radboud University Identifier:
First received: November 26, 2010
Last updated: March 30, 2016
Last verified: March 2016


Parkinson's Disease and the Atypical Parkinsonian Disorder (like Multiple System Atrophy, Progressive Supranuclear Palsy, Corticobasal Degeneration, Lewy Body Dementia) are disease entities with partly common symptomatology. Especially very early in the course of disease, the differentiation between both disease entities can be challenging, even for specialists in the field of movement disorder. However, the establishment of a correct diagnosis is very important for adequate patientcounseling, treatment and the correct inclusion of patients in research trials. Ancillary diagnostic investigations are looked upon to aid in this diagnostic dilemma.


To investigate the value of ancillary diagnostic investigations, more specific MRI, analysis of cerebrospinal fluids and a second opinion in a specialized movement disorder centre, to differentiate Parkinson's disease and the Atypical Parkisonisonian disorder.

Parkinson's Disease
Atypical Parkinsonism

Study Type: Observational
Study Design: Observational Model: Cohort
Time Perspective: Prospective
Official Title: Observational Study Assessing the Diagnostic Contribution of 3-Tesla MRI, CSF Analysis and a Second Opinion in a Specialized Movement Disorder Centre, in Differentiating Between Parkinson's Disease and Atypical Parkinsonism

Resource links provided by NLM:

Further study details as provided by Marjolein Aerts, Radboud University:

Primary Outcome Measures:
  • percentage of correct diagnosis for each of the specified ancillary investigations [ Time Frame: 36 months ]
    Percentage of correct diagnosis for each of the specified ancillary investigations to differentiate between either PD or atypical parkinsonism

Secondary Outcome Measures:
  • Percentage of correct diagnosis for each of the specified ancillary investigations [ Time Frame: 36 months ]
    Percentage of correct diagnosis for each of the specified ancillary investigations(MRI, CSF analysis, and second opinion) to differentiate between the specific diagnosis (PD, MSA, PSP, CBD, LBD, VaP)

Biospecimen Retention:   Samples With DNA
Whole blood, cerebrospinal fluids

Estimated Enrollment: 150
Study Start Date: July 2010
Estimated Study Completion Date: July 2018
Estimated Primary Completion Date: July 2017 (Final data collection date for primary outcome measure)
The cohort will consist of 150 patients with a hypokinetic rigid syndrome and a disease duration of maximum 36 months


Ages Eligible for Study:   18 Years and older   (Adult, Senior)
Sexes Eligible for Study:   All
Accepts Healthy Volunteers:   No
Sampling Method:   Non-Probability Sample
Study Population
Adult patients with a hypokinetic-rigid syndrome with a disease duration of maximum 36 months and in whom a definitive diagnosis has not been established yet.

Inclusion Criteria:

  • Hypokinetic rigid syndrome
  • Disease duration of maximum 36 months

Exclusion Criteria:

  • Probable diagnosis of PD without any red flags
  • Probable diagnosis MSA
  • Probable diagnosis PSP
  • Diagnosis CBD
  • Diagnosis DLB
  • Probable diagnosis Vascular Parkinsonism
  • Other neurodegenerative disease than parkinsonism
  • A prior history of brain surgery
  • Instable comorbidity
  Contacts and Locations
Choosing to participate in a study is an important personal decision. Talk with your doctor and family members or friends about deciding to join a study. To learn more about this study, you or your doctor may contact the study research staff using the Contacts provided below. For general information, see Learn About Clinical Studies.

Please refer to this study by its identifier: NCT01249768

Contact: B Bloem, Prof, MD

Radboud University Medical Centre Recruiting
Nijmegen, Netherlands
Sponsors and Collaborators
Radboud University
Principal Investigator: M Verbeek, PhD, MSc Radboud University
Principal Investigator: B Bloem, Prof, MD Radboud University
  More Information

Responsible Party: Marjolein Aerts, dr. M.B. Aerts, Radboud University Identifier: NCT01249768     History of Changes
Other Study ID Numbers: PADDO
Study First Received: November 26, 2010
Last Updated: March 30, 2016

Keywords provided by Marjolein Aerts, Radboud University:
Prospective study
diagnostic accuracy

Additional relevant MeSH terms:
Parkinson Disease
Parkinsonian Disorders
Basal Ganglia Diseases
Brain Diseases
Central Nervous System Diseases
Nervous System Diseases
Movement Disorders
Neurodegenerative Diseases processed this record on May 25, 2017