Environmental Epidemiology of Essential Tremor
Public ClinicalTrials.gov record NCT04576676. Field values are reproduced from the official study page; the official ClinicalTrials.gov record remains the source of truth for eligibility, enrollment, and contact information.
Data is sourced from official ClinicalTrials.gov public API records. Always review the official ClinicalTrials.gov record for the latest information.
Brief summary
Reproduced verbatim from the official ClinicalTrials.gov record. Not medical advice.
This study's research is devoted to studying the causes of tremor, and especially essential tremor (ET), which is the most common type of tremor. Previous studies have revealed a link between harmane \[HA\], a dietary neurotoxin, and ET; these studies now also suggest a link between this toxin and Parkinson's disease (PD), a related tremor disorder. Yet these links are tentative rather than conclusively established; therefore, in this new patient-based proposal, which incorporates investigations spanning two continents (North America and Europe), utilizes several complementary study designs (prospective cohort, case control), and draws on several types of tissue (blood, brain), the investigator's goal is to nail down the links between HA and ET and to further solidify the emerging links between HA and PD.
Study identification
- NCT ID
- NCT04576676
- Recruitment status
- Completed
- Study type
- Observational
- Phase
- Not listed
- Enrollment
- 1,497 participants
Conditions and interventions
Conditions
Interventions
Not listed
Eligibility (public fields only)
- Age range
- 50 Years and older
- Sex
- All
- Healthy volunteers
- Accepts healthy volunteers
This page does not interpret eligibility. Detailed inclusion and exclusion criteria are on the official ClinicalTrials.gov record.
Study timeline
- Start date
- Jul 1, 2020
- Primary completion
- Dec 19, 2022
- Completion
- Jul 18, 2023
- Last update posted
- Sep 20, 2023
2020 – 2023
United States locations
- U.S. sites
- 1
- U.S. states
- 1
- U.S. cities
- 1
| Facility | City | State | ZIP | Site status |
|---|---|---|---|---|
| University of Texas Southwestern | Dallas | Texas | 75235 | — |
Site contact phone numbers, emails, and investigator names are intentionally not displayed here. Open the official ClinicalTrials.gov record for site contact information.
About this trial record page
- What this page shows
- Public field values for ClinicalTrials.gov record NCT04576676, including study identification, conditions, interventions, eligibility (age, sex, healthy volunteer), timeline, and U.S. site list.
- What this page does not do
- No medical advice, eligibility judgments, treatment recommendations, study quality scoring, or AI-generated medical summaries. No site contact phone numbers, emails, or investigator names.
- Where the data comes from
- Sourced from the official ClinicalTrials.gov public API. The official record is the source of truth.
- Last refresh
- Last update posted Sep 20, 2023 · Synced Sep 13, 2026
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Open the official record
The complete protocol, eligibility criteria, and contact information for NCT04576676 live on ClinicalTrials.gov.