RECOMMENDATIONS RELATED TO
EPIDEMIOLOGY
Subclinical Disease and Precipitation of Acute
Events
- Clarify further the relationships of measures of
subclinical atherosclerosis with cardiovascular disease risk factors and
CVD.
- Expand population studies and epidemiological
techniques to identify factors associated with the precipitation of acute
events.
- Elucidate the relationships among thrombosis,
platelet function, inflammation, and CVD risk.
Non-invasive imaging techniques, including carotid and
aortic ultrasound, echocardiography, electrocardiography (ECG), magnetic
resonance imaging, retinal photography and computed tomographic measurement of
coronary calcium are incorporated into several large cohort studies of
individuals and families of different geographic, age, sex, and racial groups.
Results from these measurements provide increased ability to evaluate the
status of subclinical cardiovascular disease, its association with CVD risk
factors, and precipitating factors for development of overt disease. A variety
of investigator-initiated studies are using many of these techniques, including
endothelial function measures in the existing Framingham and CHS cohorts
(Benjamin, Crouse) and ongoing studies in the Muscatine cohort (Lauer, Mahoney,
Davis). Institute-initiated studies including ARIC, CHS, Framingham, Jackson,
and MESA measure a variety of risk factors such as smoking, blood pressure,
inflammation (CRP, WBC, fibrinogen, Factor VIII) and other precipitants of
acute events. MESA is specifically designed to study precipitation of acute
events and includes a range of measures of subclinical disease and its
progression to overt heart disease and stroke endpoints. Relationships among
thrombosis, platelet function, inflammation and CVD risk factors are being
evaluated in ARIC, CHS, Framingham and other studies.
Investigator-Initiated Studies
Arterial Endothelial Function - An Epidemiologic Study
(Ronald Lauer, PI) Brachial Artery Vasoreactivity and Incident CHD (John
Crouse, PI) Carotid Artery Follow-up Study (John Crouse, PI) Coronary
Artery Calcium, Exercise Tests, and CHD Outcome (Ming Wei, PI) Coronary
Screening in a High Risk Subset (Robert Detrano, PI) CT Vascular Calcium -
An Epidemiology Study in the Young (Larry Mahoney, PI) CVD Risk Factors and
Brain Morphology in NHLBI Twins (Dorit Carmelli,PI) Determinants of
Coronary Heart Disease in High Risk Families (Lewis Becker, PI) Early
Natural History of Arteriosclerosis: Bogalusa Heart Study (Gerald Berenson,
PI) Endothelial Vasomotor Function in Framingham Study (Emilia Benjamin,
PI) Epidemiology of Carotid Artery Atherosclerosis in Youth (Patricia
Davis, PI) Epidemiology of Carotid Artery Disease in Older Adults (Kim
Sutton-Tyrrell, PI) Epidemiology of Coronary Calcification in the Elderly
(Anne Newman, PI) Epidemiology of Impaired Coagulant Balance in Diabetes
(Russell Tracy, PI) Genetic Epidemiology of Coronary Artery Disease
(Charles Sing, PI) Inflammation Markers over Time in Cardiovascular Disease
(Russell Tracy, PI) Inter-associations of Vascular Disease: Structure and
Function (John Crouse, PI) Intimal Thickening and Antioxidants in Hispanics
and Anglos (James Dwyer, PI) Modifiable Risk Factors for Sudden Death in
Women (Christine Albert, PI) Novel Hemostatic Risk Factors in Framingham
(Murray Mittleman, PI) Polyunsaturated Fats and Risk of Primary Cardiac
Arrest (David Siscovick, PI) Proarrhythmic Medicines and Primary Cardiac
Arrest (David Siscovick, PI) Subclinical Heart Disease in Insulin-Dependent
Diabetes (Marian Rewers, PI) Thrombosis Markers over Time in Cardiovascular
Disease (Mary Cushman, PI) Thrombogenic Factors and Recurrent Coronary
Events (Arthur Moss, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Family Heart Study Framingham Heart
Study Jackson Heart Study Multi-Ethnic Study of Atherosclerosis
(MESA) Strong Heart Study
Distributions and Trends in Cardiovascular
Disease
- Expand population studies to monitor heart failure,
cardiomyopathies, and vascular disease of the kidney, and enhance knowledge on
their etiology and prevention.
- Measure morbidity, disability, and mortality to
major CVD in the US and compare with data from other countries, giving special
emphasis to lifestyle, geographic, socioeconomic and racial and ethnic
differences.
- Enhance knowledge concerning the distributions,
trends, and determinants of CVD risk factors in populations.
Several investigator-initiated studies of coronary
disease, congestive heart failure and renal disease will add to the body or
research in terms of secular trends, morbidity, mortality, and health care
utilization (Barker, Luepker, Roger, Shahar). Others investigate trends,
distribution and determinants of CVD risk factors in a variety of populations
and age groups (Austin, Carmelli, Stern). Investigator-initiated studies of
hypertension (Bunker, Cooper, Rotimi) provide comparisons of hypertension
incidence and prevalence among blacks living in rural West Africa, the
Caribbean and the United States. A variety of Institute-initiated studies,
including the Jackson Heart Study and CHS, are conducting research on etiology
and prevention of heart failure, cardiomyopathies, and vascular diseases of the
kidney. The ARIC Study includes community surveillance of morbidity and
mortality in addition to the study of CVD risk factors. The National
Longitudinal Mortality Study has analyzed socioeconomic, demographic and
occupational differences in mortality within the United States and has compared
mortality from ischemic heart disease and stroke among several European
countries and the United States based on type of occupation. The WHO MONICA
Project (monitoring trends and determinants in cardiovascular diseases)
measured trends in survival and coronary event rates to changes in coronary
heart disease mortality in across 37 populations in 21 countries. The Strong
Heart Study has collected CVD morbidity and mortality data in geographically
diverse groups of American Indians.
Investigator-Initiated Studies
Antihypertensive Medications, MI and Stroke (Bruce
Psaty, PI) Clinical Course of Coronary Heart Disease in Blacks (Richard
Cooper, PI) Community Surveillance of Congestive Heart Failure (Eyal
Shahar, PI) Community Surveillance of Cardiovascular Disease (Russell
Luepker, PI) Congestive Heart Failure Trends in the Elderly 1970-1994
(William Barker, PI) Coronary Disease Morbidity and Mortality in a
Population (Veronique Roger, PI) CVD Risk Factors and Brain Morphology in
Twins (Dorit Carmelli, PI) Diabetes and Cardiovascular Risk in Mexico City
(Michael Stern, PI) Epidemic Hypertension in Nigerian Workers (Clareann
Bunker, PI) Gene-Diet Interactions and Heart Disease (Costa Rica) (Hannia
Campos, PI) Genetic Epidemiology of Coronary Artery Disease (Charles Sing,
PI) Genetics of Hypertension in Blacks (Richard Cooper, PI) Genetics of
CHD Factors in Japanese Americans (Melissa Austin, PI) Glucose Tolerance
and Risk for CVD in the Elderly (J. David Curb, PI) HERITAGE Study:
Genetics, Exercise and Risk Factors (Claude Bouchard, Arthur Leon, D.C. Rao,
James Skinner, Jack Wilmore, PIs) Hypertension in Populations of West
African Origin (Richard Cooper, PI) Hypertension in Families of African
Origin (Charles Rotimi, PI) Incidence of Diabetes and CVD in Mexican
Americans (Michael Stern, PI) Lp(a), Homocysteine and CVD Risk in End Stage
Renal Disease (Joseph Longnecker, PI) Molecular Epidemiology of Essential
Hypertension (Eric Boerwinkle, PI) Prevalence of Asymptomatic Ventricular
Dysfunction (Joel Simon, PI) Risk Factors for Congestive Heart Failure in
Women (Claudia Chae, PI) Serum Ascorbate and Coronary Risk in NHANES II
(Joel Simon, PI) Statistical Methods for Longitudinal Data (Margaret Pepe,
PI) The Prevalence of Asymptomatic Ventricular Dysfunction (Richard
Rodeheffer, PI) Variability in Outcomes for Congenital Heart Disease (Kathy
Jenkins, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Framingham Heart Study Insulin
Resistance and Atherosclerosis Study (IRAS) Jacksort Heart Study
Multi-Ethnic Study of Atherosclerosis (MESA) National Longitudinal
Mortality Study (NLMS) Strong Heart Study WHO MONICA Project
Environmental and Genetic Factors
- Enhance knowledge of environmental and genetic
factors that account for differences in key risk factors among US racial and
ethnic groups.
- Further examine genetic influences on host
susceptibility to CVD and interactions of genetic factors with environmental
determinants of CVD.
- Clarify the role of environmental and genetic
factors in the development of CVD risk in young adults.
Investigator-initiated genetic studies of CVD risk
factors cover a range of molecular, and family-based investigations of CVD and
its risk factors (Becker, Bouchard, Moss). Gene-environment interactions are
examined in several studies of diet and physical activity in relation to
genetic factors (Bouchard, Campos, Kamboh). Determination of the extent and
mechanisms by which cardiovascular diseases cluster in families are important
goals of the Family Heart Study, the Framingham Heart Study and Jackson Heart
Study. The Iron Overload and Hemochromatosis Study will evaluate the ethical,
legal and social implications of genetic screening for this disorder in
approximately 100,000 individuals, and will search for new genetic variants
contributing to hemochromatosis. The Bogalusa and CARDIA studies of children
and young adults address a host of environmental, lifestyle, and genetic
contributors to the development of cardiovascular disease risk factors. The
Bogalusa cohort is currently being used in a genome-wide scan to identify genes
influencing the development of cardiovascular disease in young people and to
develop statistical methods for examining genetic influences on longitudinal
changes in CVD risk factors.
Investigator-Initiated Studies
Adolescent Risk Factors and Young Adult Cardiac Risk
(Julia Steinberger, PI) CVD Risk Factors and Brain Morphology in Twins
(Dorit Carmelli, PI) Determinants of Coronary Disease in High Risk Families
(Lewis Becker, PI) Diabetes and Cardiovascular Risk in Mexico City (Michael
Stern, PI) Early Natural History of Arteriosclerosis - Bogalusa Heart Study
(Gerald Berenson, PI) Epidemiology of Vitamin E and Carotenoids in Young
Adults (David Jacobs, PI) Epidemiology of Cardiac Development in Youth
(Darwin Labarthe, PI) Gene Mapping for Quantitative Traits (George Vogler,
PI) Gene-Diet Interactions and Heart Disease (Hannia Campos, PI)
Genetic Epidemiology of Blood Lipids and Obesity (Sue Kimm, PI) Genetic
Epidemiology of Hypertriglyceridemia (Melissa Austin, PI) Genetic
Epidemiology of Elevated Apo B Levels (Gail Jarvik, PI) Genetic
Epidemiology: Development of Cardiovascular Risk (Hermine Maes, PI) Genetic
Epidemiology of Lipoprotein-Lipid Levels (Mohammad Kamboh, PI) Genetics of
CHD Factors in Japanese Americans (Melissa Austin, PI) Genetics of CVD Risk
Factors in Samoans (Mohammad Kamboh, PI) Genetics of Hypertension in Blacks
(Richard Cooper, PI) HERITAGE Study - Genetics, Exercise, and Risk Factors
(Claude Bouchard, Arthur Leon, James Skinner, D.C. Rao, Jack Wilmore, PIs)
Hypertension in Families of African Origin (Charles Rotimi, PI) Incidence
of Diabetes and CVD in Mexican Americans (Michael Stern, PI) Insulin and
Blood Pressure Change during Adolescence (Alan Sinaiko, PI) IRAS Family
Study: Genetics of Insulin Resistance (Richard Bergman, Donald Bowden, Steven
Haffner, Marian Rewers, Mohammed Saad, Lynne Wagenknecht, PIs) Long QT
Syndrome: Genetic Studies (Arthur Moss, PI) Long QT Syndrome: Population,
Genetic, and Cardiac Studies (Arthur Moss, PI) Molecular Epidemiology of
Essential Hypertension (Eric Boerwinkle, PI) Mutations, HRT, and Venous
Thromboembolism (Bruce Psaty, PI) Plasma Homocysteine Distribution in the
US (Jacob Selhub, PI) Risk of Vascular Disease in CBS Heterozygotes (Warren
Kruger, PI) Visceral Fat, Metabolic Rate and CHD Risk in Young Adults
(Stephen Sidney, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Disease Risk Development
in Young Adults (CARDIA) Framingham Heart Study Family Heart Study
Insulin Resistance and Atherosclerosis Study (IRAS) Iron Overload and
Hemochromatosis Study Jackson Heart Study Multi-Ethnic Study of
Atherosclerosis (MESA) Strong Heart Study
Development of CVD Risk Factors Throughout the
Lifespan
- Clarify the determinants of blood pressure
increases and other risk factors changes from childhood through adult ages for
both sexes.
- Clarify the determinants of obesity and body fat
distribution in childhood and their effects on cardiovascular risk factors and
CVD throughout life.
- Clarify determinants of increases in blood
pressure, especially systolic blood pressure with age and the relationship of
blood pressure to vascular disease.
- Expand understanding of determinants of weight gain
and obesity from childhood through the adult life-span.
Obesity is a major determinant of several other
cardiovascular risk factors, but the relationships among obesity and other risk
factors appear to differ by age and ethnic group. Investigator-initiated
studies of childhood precursors to CHD (Berenson, Davis, Lauer), and studies of
intra- abdominal fat and its relationship to the development of CHD provide a
range of approaches to studying CVD risk factors in the young (Sidney). The
interrelationships of obesity, blood pressure, and other risk factors have been
examined in numerous studies that have focused on different life stages, from
pre-adolescence (for example, in the NGHS) to old age (for example, in CHS),
and among different ethnic groups, including Japanese Americans (Honolulu Heart
Program) and African-Americans (CARDIA, ARIC, and the Jackson Heart Study).
Aging-related trends in obesity and other risk factors have also been studied
in longitudinal studies, clarifying how early risk factor status may influence
risk factors and disease later in life.
Investigator-Initiated Studies
Adolescent Risk Factors and Young Adult Cardiac
Disease (Julia Steinberger, PI) Ambulatory Blood Pressure and Job Stress in
Nurses (Iris Goldstein, PI) Antecedents of Hypertension: Role of Race and
Stress (Frank Treiber, PI) Antecedents of Type A Behavior Pattern (Karen
Matthews, PI) Arterial Endothelial Function - An Epidemiologic Study
(Ronald Lauer, PI) Biobehavioral Determinants of Obesity in Black Women
(Robert Klesges, PI) Blood Pressure Control in Juveniles - Longitudinal
Study (John Pratt, PI) Central Obesity and Disease Risk in Japanese
Americans (Wilfred Fujimoto, PI) CT Vascular Calcium - An Epidemiology
Study in the Young (Larry Mahoney, PI) Early Natural History of
Arteriosclerosis: Bogalusa Heart Study (Gerald Berenson, PI) Energy Balance
in Young Black and White NGHS Women (Sue Kimm, PI) Epidemiology of Vitamin
E and Carotenoids in Young Adults (David Jacobs, PI) Epidemiology of
Carotid Artery Atherosclerosis in Youth (Patricia Davis, PI) Food and
Exercise Habits in Framingham Offspring (Curt Ellison, PI) Genetic
Epidemiology of Blood Lipids and Obesity (Sue Kimm, PI) Insulin and Blood
Pressure Change During Adolescence (Alan Sinaiko, PI) Intersalt -
International Study (Jeremiah Stamler, PI) Lifestyle and Chronic Disease in
College Alumni (Ralph Paffenbarger, PI) Meta-Analysis of Post-Smoking
Cessation Weight Gain (Leslie Robinson, PI) NHLBI Growth and Health Study
(Stephen Daniels, George Schreiber, Bruce Barton, Zi Sabry, PIs) Plasma
Homocysteine Distribution in the US (Jacob Selhub, PI) Psychosocial Factors
and Cardiovascular Disease (Thomas Pickering, PI) Risk Factors in Early
Human Atherogenesis (Frederick Cornhill, Alex McMahan, Jack Strong, Renu
Virmani, Robert Wissler, PIs) Visceral Fat, Metabolic Rate and CHD Risk in
Young Adults (Stephen Sidney, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Disease Risk Development
in Young Adults (CARDIA) Family Heart Study Jackson Heart Study
National Health and Nutrition Examination Survey (NHANES) Strong Heart
Study
CVD in Women
- Clarify further the interrelationships of
lifestyles, hormone metabolism, and psychosocial factors in the development of
CVD among women.
Major findings on the development of coronary heart
disease in women, its progression and the effect of a variety of hormone
replacement regimens come from investigator-initiated studies such as the
Healthy Women's Study (Kuller, Matthews), a study of coronary heart disease
risk factors in women as they progress through menopause, and from the Nurse's
Health Study (Manson), which followed over 120,000 nurses for over 20 years to
evaluate the effects of a variety of lifestyle and behavioral factors
associated with development of coronary heart disease risk factors and disease
endpoints. The Women's Pooling Project combines data collected over the past 40
years from long term, community-based studies in the United States in order to
examine health issues in women that cannot be adequately addressed in a single
study. Institute-initiated studies including ARIC, Framingham, CHS, Strong
Heart have analyzed data on a variety of risk factors and hormone therapies in
women. In middle-aged groups, the ARIC study has found that the established CHD
risk factors are more predictive of coronary heart disease in women than in
men.
Investigator-Initiated Studies
Biobehavioral Determinants of Obesity in Black Women
(Robert Klesges, PI) CVD Risk, Behavioral Stress and Reproductive Hormones
(Karen Matthews, PI) CVD Risk and Health in Postmenopausal Phytoestrogen
Users (Donna Kritz-Silverstein, PI) DHEAS and CVD Risk in Middle-Aged Men
and Women (John McKinlay, PI) Drug Therapy Effect on Reinfarction Risk in
Women (Susan Heckbert, PI) Epidemiology of Cardiovascular Risk Factors in
Women (Lewis Kuller, PI) Estrogen Replacement and CVD Outcomes in Diabetic
Women (Katherine Newton, PI) Modifiable Risk Factors for Sudden Death in
Men and Women (Christine Albert, PI) Mutations, HRT, and Venous
Thromboembolism (Bruce Psaty, PI) Myocardial Infarction and Current Oral
Contraceptive Use (Lynn Rosenberg, PI) Postmenopausal Progestins, MI and
Stroke (Bruce Psaty, PI) Risk Factors for Congestive Heart Failure in Women
(Claudia Chae, PI) Risk Factors for CVD in Women (Nurses' Health Study)
(JoAnne Manson, PI) The Women's Pooling Project (Lori Mosca, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Risk Development in Young
Adults Study (CARDIA) Framingham Heart Study Insulin Resistance and
Atherosclerosis Study (IRAS) Jackson Heart Study Multi-Ethnic Study of
Atherosclerosis (MESA) Strong Heart Study
CVD in Older Individuals
- Enhance understanding of the determinants and
precursors of CVD in older individuals.
Investigator-initiated studies of elderly cohorts
cover a range of subclinical assessments of clinical cardiovascular disease
risk factors (Carmelli, Curb, Nelson). One study following a previously
recruited cohort of the Systolic Hypertension in the Elderly Program examines
the prevalence and prognostic value of subclinical atherosclerosis in this
cohort and a cohort of normotensive controls (Sutton-Tyrrell). The
Institute-sponsored Framingham cohort was established in 1948 and provides 50
years of follow-up on the development and progression of CVD risk factors. As
cohorts of these major studies age, progression of subclinical to clinical CVD
can be followed from middle age into old age. The Cardiovascular Health Study
(CHS) is a population-based, longitudinal study of risk factors for the
development and progression of coronary heart disease and stroke in adults over
the age of 65 years. CHS has shown that in persons without evidence of clinical
disease at baseline, subclinical disease was frequent and increased the risk of
incident cardiovascular disease death and non-fatal myocardial infarction.
Investigator-Initiated Studies
Brachial Artery Vasoreactivity and Incident CHD (John
Crouse, PI) Congestive Heart Failure Trends in the Elderly (William Barker,
PI) CVD Risk and Brain Morphology in Twins (Dorit Carmelli, PI)
Endothelial Vasomotor Function in the Framingham Study (Emilia Benjamin,
PI) Epidemiology of Carotid Artery Disease in Older Adults (Kim
Sutton-Tyrrell, PI) Epidemiology of Coronary Calcification in the Elderly
(Anne Newman, PI) Genetic Epidemiology of Coronary Artery Disease (Charles
Sing, PI) Genetics of CHD Factors in Japanese Americans (Melissa Austin,
PI) Glucose Tolerance and Risk for CVD in the Elderly (J. David Curb,
PI) Homocysteine, Vitamin Status, and CVD Risk (Stephen Schwartz, PI)
Honolulu Heart Program: Study of Stroke and Dementia (James Nelson, PI)
Lifestyle and Chronic Disease in College Alumni (Ralph Paffenbarger, PI)
Molecular Epidemiology of Essential Hypertension (Eric Boerwinkle, PI)
Sociodemographic Regulation of CV Function and Structure (Frank Treiber,
PI) Thrombosis Markers over Time in Cardiovascular Disease (Mary Cushman,
PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Family Heart Study Framingham Heart
Study Insulin Resistance and Atherosclerosis Study (IRAS) Jackson Heart
Study Multi-Ethnic Study of Atherosclerosis (MESA) National Health and
Nutrition Examination Survey (NHANES) Strong Heart Study
Socioeconomic Status, Psychosocial Factors,
and CVD Risk
- Further clarify the relation between socioeconomic
status and CVD risk.
- Incorporate cultural assessment techniques into
cardiovascular studies.
- Define the relationship of psychosocial factors to
variations in CVD risk factors and development of atherosclerosis.
Investigator-initiated studies of hypertension among
blacks in rural West Africa, the Caribbean and the United States incorporate
assessment of cultural and lifestyle factors which may contribute to risk
factors for hypertension (Cooper). Such measures are also included in the San
Antonio Heart Study (Stern). Psychosocial factors are a major focus of several
investigator-initiated studies of hypertension, CVD, and women (Klesges,
Matthews, Pickering). The National Longitudinal Mortality Study examines the
relationship of mortality to socioeconomic status within a wide range of
demographic (regional, gender, racial, ethnic) subgroups. All major
Institute-initiated studies incorporate measures of psychosocial factors and
socioeconomic status, such as hostility, stress, depression, education, income,
discrimination, and social support, which are examined in relation to
cardiovascular disease outcomes.
Investigator-Initiated Studies
Ambulatory Blood Pressure and Job Stress in Nurses
(Iris Goldstein, PI) Antecedents of Type A Behavior Pattern (Karen
Matthews, PI) Biobehavioral Determinants of Obesity in Black Women (Robert
Klesges, PI) Clinical Course of Coronary Heart Disease in Blacks (Richard
Cooper, PI) CVD Risk, Behavioral Stress and Reproductive Hormones (Karen
Matthews, PI) Diabetes and Cardiovascular Risk in Mexican Americans
(Michael Stern, PI) Early Natural History of Arteriosclerosis - Bogalusa
Heart Study (Gerald Berenson, PI) Epidemiology of Vitamin E and Carotenoids
in Young Adults (David Jacobs, PI) Genetics of Hypertension in Blacks
(Richard Cooper, PI) Hypertension in Populations of West African Origin
(Richard Cooper, PI) Incidence of Diabetes and CVD in Mexican Americans
(Michael Stern, PI) Lifestyle and Chronic Disease in College Alumni (Ralph
Paffenbarger, PI) Psychosocial Factors and Cardiovascular Disease (Thomas
Pickering, PI) Sociodemographic Regulation of CV Function and Structure
(Frank Treiber, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Risk Development in Young
Adults Study (CARDIA) Family Heart Study Framingham Heart Study
Jackson Heart Study Multi-Ethnic Study of Atherosclerosis (MESA)
National Health and Nutrition Examination Survey (NHANES) National
Longitudinal Mortality Study (NLMS) Strong Heart Study
Physical Activity and Nutrition
- Enhance knowledge of the role of physical activity
in reducing CVD and its complications.
- Further evaluate nutritional components that
influence CVD risk factors and the development of atherosclerosis.
The goal of the investigator-initiated HERITAGE Study
is to document the role of the genotype in the cardiovascular and metabolic
responses to aerobic exercise-training, and the contribution of inherited
factors in the changes brought about by regular exercise for several diabetes
and cardiovascular disease risk factors. A long-term study of over 57,000
alumni from Harvard and the University of Pennsylvania has shown that taking up
moderate physical activity is associated with a lower risk of developing
coronary heart disease. Investigator-initiated studies address a variety of
dietary and nutritional factors which may play a role in the development of
cardiovascular disease risk factors and atherosclerosis. These include
evaluation of dietary patterns and nutrient intake and their relationship with
CVD risk factors such as blood pressure, BMI, lipid levels, and homocysteine.
(Avins, Longnecker, Millen, Selhub, Siscovick). All major Institute-initiated
studies collect data on physical activity associated with both work and leisure
and evaluate these data with relationship to CVD risk factors. In the ARIC
study, white men in the highest quartile of physical activity had an
approximately one-third lower risk of developing hypertension. Nutrition
histories are incorporated in all of the Institute-initiated prospective
studies on development of cardiovascular disease. The Framingham, ARIC and
CARDIA studies have made significant contributions to understanding the
relationship between folate status, homocysteine levels, and CVD risk.
Investigator-Initiated Studies
Children's Activities and Nutrition (Frank Treiber,
PI) Coronary Artery Calcium, Exercise Tests, and CHD Outcome (Ming Wei,
PI) Diet, Insulin Resistance and Cardiovascular Risk (Elizabeth
Meyer-Davis) Diet and Activity in Mexican American and Anglo Children
(Philip Nader, PI) Dietary Etiologies of Heart Disease and Cancer (Walter
Willett, PI) Dietary Patterns and Risk of CVD (Frank Hu, PI) Energy
Balance in Young Black and White Women (Sue Kimm, PI) Epidemiologic Studies
of Dietary Fiber and Blood Pressure (Jiang He, PI) Food and Exercise Habits
in Framingham Offspring (R. Curt Ellison, PI) Framingham Nutrition Studies
(Barbara Millen) Gene-Diet Interaction and CHD (Hannia Campos) HERITAGE
Study: Genetics, Exercise and Risk Factors (Claude Bouchard, Arthur Leon, D.C.
Rao, James Skinner, Jack Wilmore, PIs) INTERMAP - Macronutrients and Blood
Pressure (Jeremiah Stamler, PI) Lifestyle and Chronic Disease in College
Alumni (Ralph Paffenbarger, PI) LP(a), Homocysteine and CVD Risk Factors in
End Stage Renal Disease (Joseph Longnecker, PI) Physical Activity and
Cardiovascular Disease Prevention (Joan Dorn, PI) Plasma Homocysteine
Distribution in the U.S. (Jacob Selhub, PI) Polyunsaturated Fats and the
Risk of Primary Cardiac Arrest (David Siscovick, PI) Prospective Study of
Diet and CVD (Jiang He, PI) Re-evaluating Triglycerides in CHD (Andrew
Avins, PI) Relationship Between Sodium Intake and BP Control (Mark
Espeland, PI) Risk Factors for CVD in Women (Nurse's Health Study) (Joanne
Manson)
Institute-Initiated Studies
Atherosclerosis Risk in Communities (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Risk Development in Young
Adults Study (CARDIA) Family Heart Study Framingham Heart Study
Insulin Resistance and Atherosclerosis Study (IRAS) Jackson Heart Study
National Health and Nutrition Examination Survey (NHANES) Strong Heart
Study
Diabetes, Insulin, Obesity and Glucose
Metabolism
- Clarify relationships among diabetes, insulin,
obesity and glucose metabolism and the related risks of CVD in different
populations.
All of the current large population studies are
investigating one or more aspects of the relationships of diabetes and glucose
intolerance to the risk of cardiovascular diseases including CHD, stroke,
peripheral vascular disease and congestive heart failure. Several
investigator-initiated studies have examined this issue including the HERITAGE
Study and the San Antonio Heart Study. The relationship of insulin, insulin
resistance and obesity as both independent factors and as possible mediators of
the glucose-CVD relationship has been investigated in IRAS, ARIC, Framingham
and CHS. These studies have shown that diabetes is a powerful risk factor for
incident events, particularly in women. In the absence of diabetes, fasting
insulin and glucose levels appear to be associated with both subclinical
atherosclerosis measured by ultrasound and incident. There are differences in
the strength of these associations among racial and ethnic groups with the
strongest associations found in non-Hispanic whites and the weakest
associations among African Americans.
Investigator-Initiated Studies
Diabetes and Cardiovascular Risk in Mexican Americans
(Michael Stern, PI) Diet, Insulin Resistance and Cardiovascular Risk
(Elizabeth Mayer-Davis, PI) Epidemiological Study of CVD in People with
Type I Diabetes (Ronald Klein, PI) Epidemiology of Impaired Coagulant
Balance in Diabetes (Russell Tracy, PI) Estrogen Replacement and CVD
Outcomes in Diabetic Women (Katherine Newton, PI) Genetics of CHD Risk
Factors in Japanese Americans (Melissa Austin, PI) Glucose Tolerance and
Risk for CVD in the Elderly ( J. David Curb, PI) HERITAGE Study: Genetics,
Exercise and Risk Factors (Claude Bouchard, Arthur Leon, D.C. Rao, James
Skinner, Jack Wilmore, PIs) Incidence of Diabetes and CVD in Mexican
Americans (Michael Stern, PI) IRAS Family Study: Genetics of Insulin
Resistance (Richard Bergman, Donald Bowden, Steven Haffner, Marian Rewers,
Mohammed Saad, Lynne Wagenknecht, PIs) Subclinical Heart Disease in
Insulin-Dependent Diabetes (Marian Rewers, PI) Visceral Fat, Metabolic Rate
and CVD in Young Adults (Stephen Sidney, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Risk Development in Young
Adults Study (CARDIA) Family Heart Study Framingham Heart Study
Insulin Resistance and Atherosclerosis Study (IRAS) Jackson Heart Study
Multi-Ethnic Study of Atherosclerosis (MESA) National Health and
Nutrition Examination Survey (NHANES) Strong Heart Study
Technical Resources
- Develop technical resources for continuing
effective population studies of CVD epidemiology and prevention.
Several investigator-initiated studies promote the
development of statistical, data collection, and research methodologies to
extend and evaluate the use of innovative methods in longitudinal studies
(Barnhart, Cai, Joffe, Pepe, Rosner). Phase I and II Small Business and
Innovative Research (SBIR) grants support the development of software and
surveys related to cardiovascular disease research (Goldstein, Smith).
Institute-initiated studies adapt and refine a variety of data collection and
management tools for use on a population basis including subclinical disease
imaging, case-control methodology, and statistical genetic software.
Computer-aided software is used to read and synthesize physiological
measurements from such varied techniques as ultrasound, spirometry, ECGs; when
developed with contract support, these methods become freely available. Study
manuals and forms are also available from contract-supported studies and many
are posted on Internet sites such as those for Framingham (http://www.nhlbi.nih.gov/about/framingham/index.htm).
Investigator-Initiated Studies
A Self-Scored CVD Risk Appraisal (Kevin Smith, PI)
Analysis of Longitudinal Cardiopulmonary Data (Bernard Rosner, PI) Brachial
Artery Vasoreactivity and Incident CHD (John Crouse, PI) Methods for
Estimating Casual Effects in Longitudinal Studies (Marshall Joffee, PI)
Quality Assurance System for Radiology Reporting (Peter Haug, PI)
Statistical Methods for Longitudinal Data (Margaret Pepe) Statistical
Problems in Multivariate Survival Analysis (Jianwen Cai, PI) Statistical
Methods for Randomly Repeated Measures (Huiman Barnhart, PI) WINCATI
Software Tool for Survey Research (Robert Goldstein, PI)
Institute-Initiated Studies
Atherosclerosis Risk in Communities Study (ARIC)
Cardiovascular Health Study (CHS) Coronary Artery Risk Development in Young
Adults Study (CARDIA) Family Heart Study Framingham Heart Study
Insulin Resistance and Atherosclerosis Study (IRAS) Jackson Heart Study
Multi-Ethnic Study of Atherosclerosis (MESA) Strong Heart Study
Research Training
- Overcome critical shortages in the training of
individuals qualified to pursue needed research in epidemiology and prevention
of CVD.
NHLBI funds Institutional training grant programs on
cardiovascular disease epidemiology and biostatistics. Areas of emphasis
include traditional cardiovascular disease epidemiology and methods,
biostatistics and statistical genetics. There are also training opportunities
within Institute-initiated programs. The Jackson Heart study addresses the
shortage of minority investigators trained in epidemiology by providing
training at the high school, undergraduate and graduate levels during the
school year and through intensive summer training opportunities. The Framingham
Study, Cardiovascular Health Study and MESA provide opportunities for fellows
or graduate students be part of the study operations. In conjunction with the
American Heart Association, the Institute sponsors a ten-day program which
provides an intensive introduction to epidemiology, biometry and preventive
cardiology for health professionals. Two Institute-sponsored meetings on
training programs and an Institute committee have provided valuable input and
recommendations on ways to improve the training programs, match training to
current scientific needs and identify ways to provide cross-training among more
than one discipline. Further information about these programs can be obtained
from the following website: http://www.nhlbi.nih.gov/funding/training/epi-bio/index.htm.
Cardiovascular Epidemiology and Biostatistics
Training Programs:
Brigham and Women's Hospital Case Western Reserve
University (Genetic Epidemiology) Johns Hopkins University Stanford
University University of Minnesota University of North Carolina at
Chapel Hill (Biostatistics) University of North Carolina at Chapel Hill
(Cardiovascular Epidemiology) University of Pittsburgh University of
Washington (Biostatistics) University of Washington (Cardiovascular
Epidemiology) Ten-day Training Workshop in Cardiovascular Epidemiology
Recent Career Development Awards:
Adolescent Risk Factors and Young Adult Cardiac Risk
(Julia Steinberger, PI) Clinical Index to Predict Survival in Heart
Failure (Keith Aaronson, PI) Is There Sex Bias in Use of Coronary
Angiography? (Candice Wong, PI) Lp(a) Homocysteine and Cardiovascular Risk
in End Stage Renal Disease (Joseph Longnecker, PI) Modifiable Risk Factors
for Sudden Death in Men and Women (Christine Albert, PI) Risk Factors for
Congestive Heart Failure in Women (Claudia Chae, PI) Thrombosis Markers
Over Tim in Cardiovascular Disease (Mary Cushman) Variability in Outcomes
for Congenital Heart Disease (Kathy Jenkins, PI) Women's Pooling Project
(Lori Mosca, PI)
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