Cardiovascular DiseasesNCT00090467
Biochemical and Genetic Markers of Hypertension in Women
An observational study of Cardiovascular Diseases and Hypertension, run by Brigham and Women's Hospital.
Trial summary
To investigate biochemical and genetic markers of inflammation and endothelial dysfunction as determinants of hypertension. Read more about this study
- Who is it for?
- Ages 50 to 70 years, women only
- Conditions the study is for
- Cardiovascular Diseases, Hypertension, Heart Diseases
- How many people
- 1,600 participants
- Where
- No sites listed yet
- Study dates
- Aug 2004to Jul 2008
- 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 50 to 70 years
- Women only
- No healthy volunteers
- Adult, Older adult
Study population: Women's Health Initiative Observational Study (WHI OS)
We included White and Black WHI-OS participants aged <70 years, and excluded women with any baseline history of hypertension (via self-report, measured BP, or medication use), non-melanoma cancer, myocardial infarction, revascularization procedures, congestive heart failure, angina pectoris, or stroke. Further, women developing myocardial infarction or stroke, or dying from coronary heart disease or stroke during follow-up were excluded. Only for potential hypertension cases, women with revascularization procedures, congestive heart failure, angina pectoris, or non-melanoma cancer prior to or <30 days after the diagnosis of hypertension were also excluded. Finally, we excluded women with inadequate bloods or who refused to participate in a genetic study.
About this study
To investigate biochemical and genetic markers of inflammation and endothelial dysfunction as determinants of hypertension.
Read the detailed description
BACKGROUND:
Hypertension affects up to 50 million Americans, and is a major risk factor for cardiovascular disease and other health outcomes. Among Black women, hypertension is more prevalent, less well controlled by treatment, and has more damaging health outcomes versus Whites for reasons still unclear. While several lifestyle and dietary factors are associated with hypertension, relevant biochemical and genetic markers remain less well studied
DESIGN NARRATIVE:
This is a nested case-control study of incident hypertension in 800 case-control pairs (400 each of white and black women, totaling 1,600 women). Data will be used from the Women's Health Initiative Observational Study (WHI-OS), a cohort of 93,676 ethnically diverse postmenopausal women aged 50 to 79 years with extensive clinical and questionnaire data. Three hypotheses will be tested. First, the investigators will assess whether markers of inflammation - C reactive protein (CRP), interleukin-6 (IL-6), IL-1-8, tumor necrosis factor (TNF) receptor 2, soluble intercellular adhesion molecule-1 (slCAM-1), and metalloproteinase-9 (MMP-9) - are associated with the risk of hypertension in White and Black women. Second, they will examine six novel polymorphisms linked to the above inflammatory biomarkers - the CRP, IL-6, IL-1-beta, TNF-a, slCAM-1, and MMP-9 genes- and two other polymorphisms related to inflammation and the metabolic syndrome- the adiponectin and PPAR-y2 genes - for their potentially important associations with the risk of hypertension. Third, they will comprehensively evaluate important single-nucleotide polymorphisms in the above genes and examine associations between common haplotypes and hypertension risk in White and Black women, using state-of-the art genotyping technology and statistical methods. Power is excellent; for each biochemical marker, they have 80% power to detect a trend across quintiles for a relative risk (RR) of hypertension, comparing the fifth versus first quintiles, of 1.49 for analyses of 800 case-control pairs and 1.74 for analyses of 400 case-control pairs. For each genetic marker, they have 80% power to detect an additive effect of an allele for a RR of hypertension of 1.36 for 800 case-control pairs and 1.57 for 400 case-control pairs.
- Conditions
- Cardiovascular Diseases, Hypertension, Heart Diseases, Inflammation
- Medical subject headings
- Cardiovascular Diseases, Hypertension, Heart Diseases, Inflammation
What is being measured
The primary outcome is the main question the study is designed to answer.
Incident hypertension
Measured: Median follow-up of 5.9 years
Timeline
From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.
- First posted30 Aug 2004 (estimated)
- Study startAug 2004
- Primary completionJul 2008
- Study completionJul 2008
Resources
- Official record on ClinicalTrials.govThe registry entry this page is built from, with its full change history.
- Other trials for Cardiovascular DiseasesStudies of the same condition, open and under way.
- More trials run by Brigham and Women's HospitalThe 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
- Case-control
- Time perspective
- Prospective
- Enrolment
- 1,600 participants (actual)
Sponsor and investigators
- Lead sponsor
- Brigham and Women's Hospital
- Sponsor type
- University, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Responsible party
- Principal investigator, Howard D. Sesso, ScD, MPH, Brigham and Women's Hospital
- Investigators
- Howard D Sesso, ScD, MPH, Principal investigator, Brigham & Women"s Hospital
IDs, dates and publications
- ClinicalTrials.gov ID
- NCT00090467
- Sponsor's protocol ID
- 1267
- Other IDs
- R01HL075455-01
- Status last verified
- Jul 2013
- First submitted
- 26 Aug 2004
- Last updated
- 30 Jul 2013
- Results posted
- No
Study at a glance
From the registry record, last updated by the sponsor on 30 Jul 2013. Recruitment status is as the sponsor reported it: confirm with the study team.
- Official title
- Biochemical and Genetic Markers of Hypertension in Women
- ClinicalTrials.gov ID
- NCT00090467
- Acronym / sponsor ID
- 1267
- Conditions
- Cardiovascular Diseases, Hypertension, Heart Diseases, Inflammation
- Study type
- Observational
- Recruitment status
- Completed
- Enrolment
- 1,600 participants (actual)
- Lead sponsor
- Brigham and Women's HospitalUniversity, hospital or other
- Collaborators
- National Heart, Lung, and Blood Institute (NHLBI)
- Study start
- Aug 2004
- Primary completion
- Jul 2008 (actual)
- Study completion
- Jul 2008 (actual)
- First posted
- 30 Aug 2004 (estimated)
- 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.
To investigate biochemical and genetic markers of inflammation and endothelial dysfunction as determinants of hypertension.
Detailed description
BACKGROUND:
Hypertension affects up to 50 million Americans, and is a major risk factor for cardiovascular disease and other health outcomes. Among Black women, hypertension is more prevalent, less well controlled by treatment, and has more damaging health outcomes versus Whites for reasons still unclear. While several lifestyle and dietary factors are associated with hypertension, relevant biochemical and genetic markers remain less well studied
DESIGN NARRATIVE:
This is a nested case-control study of incident hypertension in 800 case-control pairs (400 each of white and black women, totaling 1,600 women). Data will be used from the Women's Health Initiative Observational Study (WHI-OS), a cohort of 93,676 ethnically diverse postmenopausal women aged 50 to 79 years with extensive clinical and questionnaire data. Three hypotheses will be tested. First, the investigators will assess whether markers of inflammation - C reactive protein (CRP), interleukin-6 (IL-6), IL-1-8, tumor necrosis factor (TNF) receptor 2, soluble intercellular adhesion molecule-1 (slCAM-1), and metalloproteinase-9 (MMP-9) - are associated with the risk of hypertension in White and Black women. Second, they will examine six novel polymorphisms linked to the above inflammatory biomarkers - the CRP, IL-6, IL-1-beta, TNF-a, slCAM-1, and MMP-9 genes- and two other polymorphisms related to inflammation and the metabolic syndrome- the adiponectin and PPAR-y2 genes - for their potentially important associations with the risk of hypertension. Third, they will comprehensively evaluate important single-nucleotide polymorphisms in the above genes and examine associations between common haplotypes and hypertension risk in White and Black women, using state-of-the art genotyping technology and statistical methods. Power is excellent; for each biochemical marker, they have 80% power to detect a trend across quintiles for a relative risk (RR) of hypertension, comparing the fifth versus first quintiles, of 1.49 for analyses of 800 case-control pairs and 1.74 for analyses of 400 case-control pairs. For each genetic marker, they have 80% power to detect an additive effect of an allele for a RR of hypertension of 1.36 for 800 case-control pairs and 1.57 for 400 case-control pairs.
Study design
- Observational model
- Case-control
- Time perspective
- Prospective
Who may qualify
- Ages
- 50 to 70 years
- Sex
- Female only
- Healthy volunteers
- Not accepted
- Age groups
- Adult, Older adult
- Study population
- Women's Health Initiative Observational Study (WHI OS)
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
Incident hypertension
Time frame: Median follow-up of 5.9 years
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 30 Jul 2013.
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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.
Howard D Sesso, ScD, MPH principal investigator
Brigham & Women"s Hospital
Questions about this trial
What is this clinical trial studying?
An observational study of Cardiovascular Diseases and Hypertension, run by Brigham and Women's Hospital.
The full registered description is in the About this study section and the official record.
Who may be eligible to take part?
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 30 Jul 2013. 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?
Incident hypertension (time frame: Median follow-up of 5.9 years). 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 30 Jul 2013.