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Your journey
1What's a trial
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More info
You can access this
clinical trial
if you have
African American Genetics
and you are
over 50
years old
This is an observational trial.
You are contributing to medical knowledge about your condition.
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The purpose

Background: In genetic studies, the quality of DNA samples is tested first. Samples that are low-quality are not used. Some studies involve minority ethnic groups. And example is admixed African American. These studies often have small sample sizes. It is important to make sure samples are not discarded unnecessarily. This may happen by using quality control (QC) thresholds for homogenous groups. These may not be appropriate for an admixed group. Researchers want to study samples that failed certain QC tests. They want to see if this has to do with the ancestry of the outliers or the quality of the samples. Objectives: To study samples that fail heterozygosity and sample genotype call rate QC. To see if the failing rates have to do with the ancestry composition of the outliers or the quality of the samples. Eligibility: No new participants. Researchers will review data that has already been collected. Design: Researchers will study DNA samples in a lab. The samples will not include data that can identify the person the sample came from.

Locations near you

Unfortunately, there are no recruiting locations near you. Please check the list with all locations below.
Tris trial is registered with FDA with number: NCT02770001. The sponsor of the trial is National Human Genome Research Institute (NHGRI) and it is looking for 0 volunteers for the current phase.
Official trial title:
Investigating the Suitability of Some Data Quality Controls Thresholds for Genetic Association Studies of Admixed Population