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Inflammation, Infection, and Future Cardiovascular Risk

This study has been completed.
Information provided by:
National Heart, Lung, and Blood Institute (NHLBI) Identifier:
First received: May 25, 2000
Last updated: June 23, 2005
Last verified: February 2005

To examine markers of underlying chronic inflammation and infection as potential risk factors for future myocardial infarction (MI), stroke (CVA), and venous thromboembolism (VTE) in plasma samples collected at baseline from healthy participants in the Physicians' Health Study (PHS).

Cardiovascular Diseases
Coronary Disease
Cerebrovascular Accident
Myocardial Infarction
Venous Thromboembolism
Heart Diseases
Chlamydia Infections
Cytomegalovirus Infections
Helicobacter Infections
Herpesviridae Infections

Study Type: Observational

Resource links provided by NLM:

Further study details as provided by National Heart, Lung, and Blood Institute (NHLBI):

Study Start Date: September 1998
Estimated Study Completion Date: August 2002
Detailed Description:


The PHS is a cohort which included 14,916 men initially free of cardiovascular disease and cancer who provided plasma samples at study entry in 1982. These men were randomly assigned in a factorial design to aspirin or beta-carotene therapy, and have been followed prospectively for the occurrence of vascular disease.


Employing a nested case-control design, baseline plasma samples are assayed for four markers of inflammation (interleukin-6, TNF-alpha, soluble ICAM, soluble VCAM) and four markers of chronic infection (antibody titers directed against Chlamydia pneumoniae, Helicobacter pylori, Herpes simplex virus, and cytomegalovirus). Case subjects are those study participants who have subsequently developed MI (N=550), CVA (N=400), or VTE (N=200). Control subjects are selected from those study participants who remained healthy during follow-up and are matched to the cases by age, smoking status, and follow-up time. Data on usual cardiovascular risk factors, lipid parameters, and hemostatic markers of risk are already available in the PHS and will be used to evaluate the results for potential confounding and effect modification. Since the PHS was a randomized trial of low-dose aspirin for its initial 5 years, this cohort also provides the unique opportunity to investigate whether the use of an agent with anti-inflammatory properties modifies the risk of subsequent thrombosis among those with underlying inflammation. Indeed, this intriguing hypothesis has recently been raised regarding data relating another marker of inflammation, C-reactive protein, to future risks of myocardial infarction and stroke.

These analyses will take advantage of an existing blood bank from a well-characterized large cohort with many years of follow-up and high quality end-point verification. Thus, this study could provide an efficient and cost-effective mechanism to evaluate the posited, but unproven roles of inflammation and infection as risk factors for future cardiovascular disease.


Genders Eligible for Study:   Male
Accepts Healthy Volunteers:   No

No eligibility criteria

  Contacts and Locations
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Please refer to this study by its identifier: NCT00005496

Sponsors and Collaborators
Investigator: Paul Ridker Brigham and Women's Hospital
  More Information

Publications: Identifier: NCT00005496     History of Changes
Other Study ID Numbers: 5014
Study First Received: May 25, 2000
Last Updated: June 23, 2005
Health Authority: United States: Federal Government

Additional relevant MeSH terms:
Cardiovascular Diseases
Cerebral Infarction
Chlamydia Infections
Communicable Diseases
Coronary Artery Disease
Coronary Disease
Cytomegalovirus Infections
Heart Diseases
Helicobacter Infections
Herpesviridae Infections
Myocardial Infarction
Venous Thromboembolism
Venous Thrombosis
Arterial Occlusive Diseases
Bacterial Infections
Brain Diseases
Brain Infarction
Brain Ischemia
Central Nervous System Diseases
Cerebrovascular Disorders
Chlamydiaceae Infections
DNA Virus Infections
Embolism and Thrombosis
Genital Diseases, Female processed this record on November 27, 2014