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AzTrials

Cardiovascular DiseasesNCT00006539

Thrombotic, Inflammatory & Gene Markers of CVD in Women

An observational study of Cardiovascular Diseases and Heart Diseases, run by National Heart, Lung, and Blood Institute (NHLBI).

Completed

Finished. The study has ended and is not enrolling. Results may be posted on the official record.

Official record
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Trial summary

To evaluate a series of thrombotic, inflammatory, and genetic markers for myocardial infarction among participants in the Women's Health Initiative Observational Study (WHI-OS). Read more about this study

Who is it for?
Ages 50 to 79 years, women only
How many people
Not given
Where
No sites listed yet
Study dates
Sep 1999to Aug 2004
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 79 years
  • Women only
  • No healthy volunteers
  • Adult, Older adult

No eligibility criteria

About this study

To evaluate a series of thrombotic, inflammatory, and genetic markers for myocardial infarction among participants in the Women's Health Initiative Observational Study (WHI-OS).

Read the detailed description

BACKGROUND:

Over the past 50 years, considerable progress has been made in understanding factors that stimulate the development of atherosclerosis and other manifestations of "preclinical cardiovascular disease," and in documenting the 2- to 4-fold higher risk of subsequent myocardial infarction or other morbid events in asymptomatic individuals with such pathological transformations in arteries or the heart. However, much less information is available about the factors ("triggers") that precipitate morbid and mortal events in high-risk individuals. Recent work by Paul Ridker and colleagues and other groups has identified associations between the presence of markers of prothrombotic tendencies, inflammation and immune activation and myocardial infarction and other cardiovascular disease (CVD) events. However, most available data have been obtained in men and less is known about the relevance of these newer risk factors and potential "triggers" to stimulation of atherosclerosis and precipitation of CVD events in women. In this context, research to examine the relation of both relatively new and potentially novel "triggers" to subsequent myocardial infarction in women is of considerable potential clinical and biological significance.

DESIGN NARRATIVE:

Drs. Ridker and colleagues comprehensively evaluated a series of thrombotic, inflammatory, and genetic markers for myocardial infarction (MI) among participants in the Women's Health Initiative Observational Study (WHI-OS), a prospective cohort study of over 90,000 ethnically representative post-menopausal American women aged 50-79 years. Employing a prospective nested case-control design, they assayed baseline plasma and buffy coat samples for nine markers of increased thrombotic potential (tissue-type plasminogen activator (tPA), plasminogen activator inhibitor type 1 (PAI-1), total plasma homocysteine, prothrombin fragment F1+2, D-dimer, APC-R, C-reactive protein, interleukin-6, and sICAM-1) to determine whether elevations of these parameters led to future MI or coronary death. They also explored common genetic polymorphisms in the tPA, PAI-1, MTHFR, thrombomodulin, prothrombin, and factor V genes so that both inherited and environmental determinants of coronary thrombosis in women could simultaneously be evaluated. Case subjects were WHI-OS participants who were free of cardiovascular disease at study entry and subsequently developed a documented MI or coronary death during follow-up (N = 650). Control subjects were selected from study participants who remained free of disease during follow-up; controls were 1:1 matched to cases by age, smoking status, ethnicity, and follow-up time. Data on usual risk factors, hormone replacement therapy, and standard lipid profiles were used to evaluate for potential confounding and effect modification. The analyses took advantage of a unique and unprecedented blood bank from a well-characterized, ethnically diverse, large-scale cohort of post-menopausal women with ongoing follow-up and high quality endpoint verification, thereby providing an efficient way to critically evaluate the hypothesized roles of hemostasis, thrombosis and inflammation as risk factors for future MI and coronary death among American women.

The study completion date listed in this record was obtained from the "End Date" entered in the Protocol Registration and Results System (PRS) record.

Medical subject headings
Cardiovascular Diseases, Heart Diseases, Myocardial Infarction

Timeline

From the start of the study to its completion; the mark is today. Estimated dates are the sponsor’s plan.

  1. First posted28 Nov 2000 (estimated)
  2. Study startSep 1999
  3. Study completionAug 2004

Resources

More details

For doctors and researchers: how the study is designed, who runs it, and its registry IDs.

Study design
Study type
Observational
IDs, dates and publications
ClinicalTrials.gov ID
NCT00006539
Sponsor's protocol ID
952
Other IDs
R01HL063293
Status last verified
Mar 2005
First submitted
28 Nov 2000
Last updated
16 Mar 2016
Results posted
No

Publications

  • Zee RY, Bates D, Ridker PM. A prospective evaluation of the CD14 and CD18 gene polymorphisms and risk of stroke. Stroke. 2002 Apr;33(4):892-5. doi: 10.1161/01.str.0000014564.75483.ec.

    PubMed 11935032

  • Zee RY, Lunze K, Lindpaintner K, Ridker PM. A prospective evaluation of the interleukin-1 receptor antagonist intron 2 gene polymorphism and the risk of myocardial infarction. Thromb Haemost. 2001 Nov;86(5):1141-3.

    PubMed 11816697

  • Pradhan AD, Manson JE, Rifai N, Buring JE, Ridker PM. C-reactive protein, interleukin 6, and risk of developing type 2 diabetes mellitus. JAMA. 2001 Jul 18;286(3):327-34. doi: 10.1001/jama.286.3.327.

    PubMed 11466099

  • Pradhan AD, Rifai N, Ridker PM. Soluble intercellular adhesion molecule-1, soluble vascular adhesion molecule-1, and the development of symptomatic peripheral arterial disease in men. Circulation. 2002 Aug 13;106(7):820-5. doi: 10.1161/01.cir.0000025636.03561.ee.

    PubMed 12176954

  • Zee RY, Ridker PM. Polymorphism in the human C-reactive protein (CRP) gene, plasma concentrations of CRP, and the risk of future arterial thrombosis. Atherosclerosis. 2002 May;162(1):217-9. doi: 10.1016/s0021-9150(01)00703-1.

    PubMed 11947917

  • Ridker PM, Rifai N, Rose L, Buring JE, Cook NR. Comparison of C-reactive protein and low-density lipoprotein cholesterol levels in the prediction of first cardiovascular events. N Engl J Med. 2002 Nov 14;347(20):1557-65. doi: 10.1056/NEJMoa021993.

    PubMed 12432042

  • Brown DA, Breit SN, Buring J, Fairlie WD, Bauskin AR, Liu T, Ridker PM. Concentration in plasma of macrophage inhibitory cytokine-1 and risk of cardiovascular events in women: a nested case-control study. Lancet. 2002 Jun 22;359(9324):2159-63. doi: 10.1016/S0140-6736(02)09093-1.

    PubMed 12090982

  • Ridker PM, Buring JE, Cook NR, Rifai N. C-reactive protein, the metabolic syndrome, and risk of incident cardiovascular events: an 8-year follow-up of 14 719 initially healthy American women. Circulation. 2003 Jan 28;107(3):391-7. doi: 10.1161/01.cir.0000055014.62083.05.

    PubMed 12551861

  • Pradhan AD, Manson JE, Meigs JB, Rifai N, Buring JE, Liu S, Ridker PM. Insulin, proinsulin, proinsulin:insulin ratio, and the risk of developing type 2 diabetes mellitus in women. Am J Med. 2003 Apr 15;114(6):438-44. doi: 10.1016/s0002-9343(03)00061-5.

    PubMed 12727576

  • Ridker PM. Clinical application of C-reactive protein for cardiovascular disease detection and prevention. Circulation. 2003 Jan 28;107(3):363-9. doi: 10.1161/01.cir.0000053730.47739.3c. No abstract available.

    PubMed 12551853

  • Blake GJ, Rifai N, Buring JE, Ridker PM. Blood pressure, C-reactive protein, and risk of future cardiovascular events. Circulation. 2003 Dec 16;108(24):2993-9. doi: 10.1161/01.CIR.0000104566.10178.AF. Epub 2003 Nov 24.

    PubMed 14638538

  • Ridker PM, Bassuk SS, Toth PP. C-reactive protein and risk of cardiovascular disease: evidence and clinical application. Curr Atheroscler Rep. 2003 Sep;5(5):341-9. doi: 10.1007/s11883-003-0004-3. No abstract available.

    PubMed 12911843

  • Pradhan AD, Cook NR, Buring JE, Manson JE, Ridker PM. C-reactive protein is independently associated with fasting insulin in nondiabetic women. Arterioscler Thromb Vasc Biol. 2003 Apr 1;23(4):650-5. doi: 10.1161/01.ATV.0000065636.15310.9C. Epub 2003 Mar 6.

    PubMed 12692007

  • Zee RY, Hegener HH, Cook NR, Ridker PM. C-reactive protein gene polymorphisms and the risk of venous thromboembolism: a haplotype-based analysis. J Thromb Haemost. 2004 Aug;2(8):1240-3. doi: 10.1111/j.1538-7836.2004.00773.x.

    PubMed 15304023

  • Bassuk SS, Rifai N, Ridker PM. High-sensitivity C-reactive protein: clinical importance. Curr Probl Cardiol. 2004 Aug;29(8):439-93.

    PubMed 15258556

Questions about this trial

What is this clinical trial studying?

An observational study of Cardiovascular Diseases and Heart Diseases, run by National Heart, Lung, and Blood Institute (NHLBI).

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 16 Mar 2016. 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.

Where can I read the original study information?

On the ClinicalTrials.gov record for NCT00006539, which also lists 22 linked publications.

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 16 Mar 2016.

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