Telomere Length, Mean LeukocyteNCT03302104
Diet Quality and LTL in NHANES
An observational study of Telomere Length, Mean Leukocyte and Diet Habit, run by University of California, San Francisco.
Trial summary
In our study, we used data from 4,758 healthy adults from the 1999-2002 National Health and Nutrition Examination Surveys to examine the associations between evidence-based diet quality indices and leukocyte telomere length. Read more about this study
- Who is it for?
- Ages 20 to 65 years
- Conditions the study is for
- Telomere Length, Mean Leukocyte, Diet Habit
- How many people
- 4,758 participants
- Where
- No sites listed yet
- Study dates
- 1 Jan 1999to 31 Dec 2002
- Phase
- Observational
- Are there results?
- None posted in the registry
Key requirements
Who can take part, as listed by the sponsor. Only the study team can confirm whether you are eligible, so take this list to your doctor.
- Ages 20 to 65 years
- All sexes
- Adult, Older adult
Study population: The study population was comprised of 4,758 healthy adults, aged 20 to 65 years, who had complete dietary and leukocyte telomere length (LTL) data measured in 1999-2002 National Health and Nutrition Examination Surveys (NHANES), without a prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer).
Who may be able to join
- Ages 20 to 65 years
- No prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer)
Who cannot join
- Prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer)
- Younger than age 20 or older than age 65
About this study
Official title: Diet Quality Indices and Leukocyte Telomere Length Among Healthy US Adults: Data From the National Health and Nutrition Examination Surveys (NHANES) 1999-2002
In our study, we used data from 4,758 healthy adults from the 1999-2002 National Health and Nutrition Examination Surveys to examine the associations between evidence-based diet quality indices and leukocyte telomere length. Our study assessed the four most widely recognized and commonly used diet quality indices in nutritional epidemiology: the USDA-developed Healthy Eating Index-2010, the Alternate Healthy Eating Index-2010, the Mediterranean Diet Score, and the DASH diet score. Analyses were adjusted for sociodemographic and health variables known to influence dietary intake and cellular aging.
- Conditions
- Telomere Length, Mean Leukocyte, Diet Habit
- Medical subject headings
- Feeding Behavior
What is being measured
The primary outcome is the main question the study is designed to answer.
Leukocyte telomere length
Measured: 1999-2002
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted4 Oct 2017
- Study start1 Jan 1999
- Primary completion31 Dec 2002
- Study completion31 Dec 2002
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Telomere Length, Mean LeukocyteStudies of the same condition, open and under way.
- More trials run by University of California, San FranciscoThe sponsor's other registered studies.
- What the trial phases meanHow a treatment moves from first tests in people to approval.
More details
For doctors and researchers: how the study is designed, who runs it, and its registry IDs.
Study design
- Study type
- Observational
- Observational model
- Other
- Time perspective
- Cross-sectional
- Enrolment
- 4,758 participants (actual)
Sponsor and investigators
- Lead sponsor
- University of California, San Francisco
- Sponsor type
- University, hospital or other
- Responsible party
- Sponsor
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT03302104
- Sponsor's protocol ID
- R01AG033592-01A1
- Status last verified
- Sep 2017
- First submitted
- 22 Sep 2017
- Last updated
- 4 Oct 2017
- Results posted
- No
- Data monitoring committee
- No
- FDA-regulated drug
- No
- FDA-regulated device
- No
Study at a glance
From the registry record, last updated by the sponsor on 4 Oct 2017. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Diet Quality Indices and Leukocyte Telomere Length Among Healthy US Adults: Data From the National Health and Nutrition Examination Surveys (NHANES) 1999-2002
- ClinicalTrials.gov ID
- NCT03302104
- Acronym / sponsor ID
- R01AG033592-01A1
- Conditions
- Telomere Length, Mean Leukocyte, Diet Habit
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 4,758 participants (actual)
- Lead sponsor
- University of California, San FranciscoUniversity, hospital or other
- Study start
- 1 Jan 1999 (actual)
- Primary completion
- 31 Dec 2002 (actual)
- Study completion
- 31 Dec 2002 (actual)
- First posted
- 4 Oct 2017 (actual)
- Results
- Not posted in the source record
Clinical summary
The research question as the sponsor registered it. This describes what the study plans to test, not what it found.
In our study, we used data from 4,758 healthy adults from the 1999-2002 National Health and Nutrition Examination Surveys to examine the associations between evidence-based diet quality indices and leukocyte telomere length. Our study assessed the four most widely recognized and commonly used diet quality indices in nutritional epidemiology: the USDA-developed Healthy Eating Index-2010, the Alternate Healthy Eating Index-2010, the Mediterranean Diet Score, and the DASH diet score. Analyses were adjusted for sociodemographic and health variables known to influence dietary intake and cellular aging.
Study design
- Observational model
- Other
- Time perspective
- Cross-sectional
Who may qualify
- Ages
- 20 to 65 years
- Sex
- All
- Age groups
- Adult, Older adult
- Study population
- The study population was comprised of 4,758 healthy adults, aged 20 to 65 years, who had complete dietary and leukocyte telomere length (LTL) data measured in 1999-2002 National Health and Nutrition Examination Surveys (NHANES), without a prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer).
Key inclusion criteria (2 listed)
- Ages 20 to 65 years
- No prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer)
Key exclusion criteria (2 listed)
- Prior diagnosis of major chronic disease (coronary heart disease, angina, myocardial infarction, stroke, diabetes, congestive heart failure, and cancer)
- Younger than age 20 or older than age 65
Eligibility is decided by the study team after screening; this overview does not establish that a patient qualifies. Full inclusion and exclusion criteria.
Primary outcome
Leukocyte telomere length
Time frame: 1999-2002
Results and safety
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
Research links
- Official record on ClinicalTrials.govLast updated by the sponsor 4 Oct 2017.
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Referral and contact
AzTrials does not enrol participants or take referrals. Contact the study team or a site listed below; they decide who can take part. This study is not recruiting at the moment.
The record lists no contact. Use the official record to reach the sponsor.
Questions about this trial
What is this clinical trial studying?
An observational study of Telomere Length, Mean Leukocyte and Diet Habit, run by University of California, San Francisco.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
The sponsor lists 2 inclusion and 2 exclusion criteria. Eligibility is decided by the study team after screening, so read the full criteria and contact a listed site.
Is this clinical trial currently recruiting?
The record says: finished, as of the sponsor's last update on 4 Oct 2017. Status can change between updates, so confirm with the study contact before making plans.
What are the possible benefits and risks?
They depend on the study and the treatment, and no study can promise a benefit. The study team explains the known risks during informed consent, before anyone joins; the record itself does not list them.
Are results available for this study?
The study is completed, but results are not available in the source record. That does not mean the treatment did or did not work.
How can a doctor refer a patient or contact the research team?
The record lists no contact. The official record names the sponsor, who can be asked directly. AzTrials does not enrol participants or take referrals.
What does the primary outcome measure?
Leukocyte telomere length (time frame: 1999-2002). It is what the study was designed to measure, not a finding.
Where can I read the original study information?
Does a listing mean the treatment is approved or proven to work?
No. A listing means the study is registered. It does not show that the treatment is safe, works, or is approved by a regulator.
How often is this information updated?
AzTrials copies changed records from ClinicalTrials.gov every night and reloads the whole registry every week. The sponsor last updated this record on 4 Oct 2017; AzTrials last refreshed its copy on 31 Oct 2026.