PARKINSON BRASIL - Database on Motor and Non-Motor Aspects of Parkinson's Disease in Brazil

May 16, 2026 updated by: Adriano de Oliveira Andrade, Federal University of Uberlandia
This is an observational, cross-sectional study with a control group, with the general objective of developing and evaluating a national database, unprecedented in Brazil, containing clinical, epidemiological, motor, and non-motor aspects of Parkinson's disease (PD). The database will be open and accessible to national and international researchers in order to contribute to the advancement of research related to PD. The aim is to collect data, in a paired way, from a control group and an experimental group. Data collection will include the application of questionnaires, the execution of motor activities, and clinical scales. Information that can identify the participants will be removed from the database for later storage in a repository. Quantitative, qualitative, and descriptive variables from the database will be estimated in order to characterise and contrast the groups studied. The results of this study will contribute to a better characterization of the staging of PD as a function of the epidemiological, motor, and non-motor aspects evaluated, as well as to the development of technologies and methods that can be applied in clinical practice.

Study Overview

Status

Recruiting

Conditions

Study Type

Observational

Enrollment (Estimated)

958

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

  • Name: Adriano Andrade, PhD
  • Phone Number: +55 34 3239-4761
  • Email: adriano@ufu.br

Study Contact Backup

  • Name: Adriano Andrade, PhD
  • Phone Number: + 34 3239-4761
  • Email: adriano@ufu.br

Study Locations

    • Federal District
      • Brasília, Federal District, Brazil, 72220-275
        • Not yet recruiting
        • Laboratório de Análise de Movimento e Processamento de Sinais
        • Contact:
    • Goiás
      • Goiânia, Goiás, Brazil, 74.223-060
        • Recruiting
        • Centro Universitário Araguaia (UniAraguaia)
        • Contact:
      • Goiânia, Goiás, Brazil, 74265-320
        • Not yet recruiting
        • Associação Parkinson Goiás
        • Contact:
    • Minas Gerais
      • Uberlândia, Minas Gerais, Brazil, 38405-318
        • Recruiting
        • Ambulatório de Doença de Parkinson e Distúrbios do Movimento do Hospital de Clínicas de Uberlândia
        • Contact:
      • Uberlândia, Minas Gerais, Brazil, 38408-100
        • Recruiting
        • Núcleo de Inovação e Avaliação Tecnológica em Saúde / Centre for Innovation and Technology Assessment in Health
        • Contact:

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

  • Experimental group: Individuals diagnosed with Parkinson's disease
  • Control group: Individuals not having Parkinson's disease (PD) or other neurological disease that resembles PD;

Description

Inclusion Criteria:

  • Experimental group: (i) present a neurological diagnosis of Parkinson's disease; (ii) be classified between stages I to IV of the Hoehn & Yahr Scale; (iii) have central visual acuity equal to or greater than 20/40 (equivalent to 0.50) in each eye or equal to or greater than 20/30 (equivalent to 0.66) in one eye according to the Snellen scale.
  • Control group: (i) not having a neurological diagnosis of Parkinson's disease or other neurological disease that resembles PD; (ii) have central visual acuity equal to or greater than 20/40 (equivalent to 0.50) in each eye or equal to or greater than 20/30 (equivalent to 0.66) in one eye according to the Snellen scale.

Exclusion Criteria:

For both groups, individuals who have other neurological or musculoskeletal diseases that interfere with the execution of the tests will be excluded.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

Cohorts and Interventions

Group / Cohort
Experimental group
Group of subjects with Parkinson's disease
Control group
Neurological healthy subjects

What is the study measuring?

Primary Outcome Measures

Outcome Measure
Measure Description
Time Frame
Sex
Time Frame: 10 years
Sex: male, female
10 years
Age
Time Frame: 10 years
Age in years
10 years
Length of schooling
Time Frame: 10 years
Length of schooling in years
10 years
Weight
Time Frame: 10 years
Weight in kg
10 years
Height
Time Frame: 10 years
Height in cm
10 years
Blood type
Time Frame: 10 years
Blood type: A+, A-, B+, B-, O+, O-, AB+, AB-
10 years
Economic Rating Score
Time Frame: 10 years
Economic rating as given by the Brazilian Economic Classification Criteria (Brazilian Criteria) - https://www.abep.org/criterioBr/01_cceb_2022_eng.pdf
10 years
Primary ICD
Time Frame: 10 years
Primary disorder classification according to the International Statistical Classification of Diseases and Related Health Problems (ICD) https://www.who.int/standards/classifications/classification-of-diseases
10 years
Secondary ICDs
Time Frame: 10 years
Secondary disorder according to the International Statistical Classification of Diseases and Related Health Problems (ICD) https://www.who.int/standards/classifications/classification-of-diseases
10 years
Medications in use
Time Frame: 10 years
name and daily dose of medications
10 years
Family history related to the primary ICD
Time Frame: 10 years
Is there family history related to the primary ICD? (yes, no)
10 years
Date of symptom onset related to the primary ICD
Time Frame: 10 years
date
10 years
Date of diagnosis related to the primary ICD
Time Frame: 10 years
date
10 years
Current city of residence
Time Frame: 10 years
City of residence in Brazil
10 years
Current state of residence
Time Frame: 10 years
State of residence in Brazil
10 years
Civil status
Time Frame: 10 years
married, single, divorced, and widowed
10 years
Housing classification
Time Frame: 10 years
Housing classification by type of housing ownership rights: State-owned housing, Municipality-owned housing, Natural person's owned housing, Legal person's owned housing, Private renting, Other
10 years
Household size
Time Frame: 10 years
The number of adults and children living in a home
10 years
Laterality
Time Frame: 10 years
Laterality refers to the preference for using one side of the body over the other and is most commonly associated with hand dominance, such as being right-handed or left-handed, e.g., Right-handedness, Left-handedness, Ambidexterity, Mixed-handedness (Cross-dominance).
10 years
Use of technology
Time Frame: 10 years
Verification if the participant has had contact with one of the following devices: mobile, personal computer, mouse, webcam, keyboard, microphone, earphone.
10 years
Occupation
Time Frame: 10 years
Profession according to the Brazilian Classification of Occupation (https://www.mtecbo.gov.br/cbosite/pages/home.jsf)
10 years
Monthly wage
Time Frame: 10 years
Monthly wage in Brazilian Reais
10 years
Head movement amplitude
Time Frame: 10 years
Head movement amplitude in degrees
10 years
Head movement speed
Time Frame: 10 years
Head movement speed in degrees per second
10 years
Facial expression
Time Frame: 10 years
Facial expression evaluation according to the Facial Action Coding System (FACS)
10 years
Saccadic eye movement
Time Frame: 10 years
Speed and regularity of eye movement (degrees per second and latency in ms)
10 years
Smooth pursuit eye movement
Time Frame: 10 years
Smooth pursuit are quantified by the gain (how well the eyes follow the target in speed) and phase (distance to the target during pursuit)
10 years
Handwriting movement analysis
Time Frame: 10 years
Handwriting speed (seconds) and quality
10 years
Visual Acuity
Time Frame: 10 years
Visual Acuity measured according to the Snellen test (https://www.ncbi.nlm.nih.gov/books/NBK558961/)
10 years
Dysarthria
Time Frame: 10 years
Dysarthria measured according to the protocol for the evaluation of central dysartries in patients with Parkinson's Disease (https://doi.org/10.1590/S1516-18462011005000030)
10 years
Hand movement
Time Frame: 10 years
Hand movement in degrees per second
10 years
MDS-Unified Parkinson's Disease Rating Scale (MDS-UPDRS)
Time Frame: 10 years

Clinical scale for measuring signs and symptoms of Parkinson's disease (https://www.movementdisorders.org/MDS/MDS-Rating-Scales/MDS-Unified-Parkinsons-Disease-Rating-Scale-MDS-UPDRS.htm?gad_source=1&gclid=CjwKCAjwnqK1BhBvEiwAi7o0X6DuHrFh3qftNQ1N9AGWMkFo4BpG6b3hAFWnoh2Dwu86DPY53ZXpKRoCBRYQAvD_BwE)

Each item of the Movement Disorder Society-Unified Parkinson's Disease Rating Scale will be evaluated as 0: Normal; 1: Slight; 2: Mild; 3: Moderate; 4: Severe.

The minimum value of the scale is 0, whereas the maximum value is 4. Higher scores mean a worse outcome.

10 years
Depression
Time Frame: 10 years

Depression measured according to the Geriatric Depression Scale (GDS) https://geriatrictoolkit.missouri.edu/cog/GDS_SHORT_FORM.PDF

The Geriatric Depression Scale has 15 items. The minimum total score is zero, and the maximum is 15. Higher scores mean a worse outcome.

10 years
Cognition
Time Frame: 10 years

Cognition measured according to the Montreal Cognitive Assessment (MOCA) scale

The Montreal Cognitive Assessment (MoCA) is a 30-point test. The minimum total score is zero, and the maximum is 30. Higher scores mean a better outcome.

10 years

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Publications and helpful links

The person responsible for entering information about the study voluntarily provides these publications. These may be about anything related to the study.

General Publications

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Actual)

January 1, 2025

Primary Completion (Estimated)

October 1, 2034

Study Completion (Estimated)

October 1, 2034

Study Registration Dates

First Submitted

July 28, 2024

First Submitted That Met QC Criteria

July 30, 2024

First Posted (Actual)

August 2, 2024

Study Record Updates

Last Update Posted (Actual)

May 19, 2026

Last Update Submitted That Met QC Criteria

May 16, 2026

Last Verified

May 1, 2026

More Information

Terms related to this study

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

YES

IPD Plan Description

The data will be anonymised, stored in a safe and international plataform (Zenodo - https://github.com/NIATS-UFU). Only information that can be used to identify the subjects will be shared.

IPD Sharing Time Frame

Starting 6 months after publication

IPD Sharing Access Criteria

Researchers that wish to have access to the data can request access at https://github.com/NIATS-UFU. Full access will be granted for research purposes.

IPD Sharing Supporting Information Type

  • STUDY_PROTOCOL
  • SAP
  • ANALYTIC_CODE

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

product manufactured in and exported from the U.S.

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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