- ICH GCP
- US Clinical Trials Registry
- Clinical Trial NCT01704300
Body Mass Index and Initial Presentations of Cardiovascular Diseases (CALIBER)
Study Overview
Status
Detailed Description
Obesity has many detrimental effects on the cardiovascular system that can manifest in a range of clinical presentations. Many of these are mediated by frequently coexisting conditions such as diabetes, hypertension and dyslipidemia but there are also direct, progressive effects on the arteries and the heart muscle. As evident from autopsies, even from early adulthood the degree of coronary artery disease (CAD) correlates with the BMI and particularly the amount of abdominal fat. The multiple mechanisms by which obesity exerts its effects are still being elucidated.
Previous studies have assessed the effect of obesity on cause-specific mortality. Here the investigators analyze association of BMI with the first symptomatic presentation of cardiovascular disease across any phenotypes, to which the investigators refer to as "initial presentation" to distinguish from first presentation within a specific phenotype. For example, an initial presentation with myocardial infarction is an MI which is not preceded by stable angina, ischemic stroke or any other phenotype, rather than the first MI in a possible series of MIs, as is commonly used in other studies.
Adjustments The key risk factor of interest is baseline BMI, which the investigators define as the most recent measurement of BMI recorded up to 2 years prior to cohort entry date. BMI will be analyzed based on the following categories: underweight (<18.5 kg/m2), healthy (18.5 to 24 kg/m2), overweight (25 to 29 kg/m2), moderately obese (30 to 34 kg/m2), morbidly obese (>35 kg/m2). The healthy BMI category will be used as the reference in regression models.
Associations with BMI will be adjusted for age, sex, ethnicity, social deprivation, smoking, diabetes, and systolic blood pressure, total cholesterol (TCHOL) and high-density lipoprotein cholesterol (HDL). All baseline covariates will be obtained from within a 2 year window prior to study entry.
Statistical analyses Cause-specific Cox models will be used to measure the association between BMI categories and endpoints of interest. Multiple imputation will be used to replace missing values in prognostic factors. The investigators will estimate lifetime risk for each endpoint over time adjusting for competing risks.
Study Type
Enrollment (Actual)
Contacts and Locations
Study Locations
-
-
-
London, United Kingdom, WC1E 6BT
- University College London
-
-
Participation Criteria
Eligibility Criteria
Ages Eligible for Study
Accepts Healthy Volunteers
Genders Eligible for Study
Sampling Method
Study Population
Description
Inclusion Criteria:
- Baseline age ≥30 years
Exclusion Criteria:
- prior atherosclerotic disease or stroke
Study Plan
How is the study designed?
Design Details
Cohorts and Interventions
Group / Cohort |
---|
CALIBER Healthy Cohort
We will report findings from the CALIBER (CArdiovascular disease research using Linked BEspoke studies and Electronic Records) collaboration where we linked primary care data (from the General Practice Research Database [GPRD]) to three further sources of electronic health records: the Myocardial Ischemia National Audit Project registry (MINAP),cause specific discharge data from Hospital Episodes Statistics (HES) and cause specific mortality from the Office for National Statistics (ONS).
|
Collaborators and Investigators
Sponsor
Study record dates
Study Major Dates
Study Start
Primary Completion (Actual)
Study Completion (Actual)
Study Registration Dates
First Submitted
First Submitted That Met QC Criteria
First Posted (Estimate)
Study Record Updates
Last Update Posted (Estimate)
Last Update Submitted That Met QC Criteria
Last Verified
More Information
Terms related to this study
Keywords
- Acute Myocardial Infarction
- Peripheral arterial disease
- Heart failure
- Coronary heart disease not otherwise specified
- Unstable angina
- Stable angina
- Abdominal aortic aneurysm
- Transient Ischemic Attack
- Haemorrhagic stroke
- Ischaemic stroke
- Unheralded coronary death
- Ventricular arrhythmias, cardiac arrest and sudden cardiac death
Additional Relevant MeSH Terms
- Ischemia
- Pathologic Processes
- Necrosis
- Myocardial Ischemia
- Heart Diseases
- Vascular Diseases
- Arteriosclerosis
- Arterial Occlusive Diseases
- Atherosclerosis
- Aortic Diseases
- Myocardial Infarction
- Infarction
- Heart Failure
- Cardiovascular Diseases
- Peripheral Arterial Disease
- Peripheral Vascular Diseases
- Aneurysm
- Aortic Aneurysm
- Aortic Aneurysm, Abdominal
Other Study ID Numbers
- CALIBER 10_14
This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.
Clinical Trials on Heart Failure
-
Tufts Medical CenterMetro West Medical CenterCompletedCongestive Heart Failure | Diastolic Heart Failure | Systolic Heart FailureUnited States
-
Abbott Medical DevicesCompletedHeart Failure | Heart Failure, Diastolic | Heart Failure, Systolic | Heart Failure NYHA Class II | Heart Failure NYHA Class III | Heart Failure With Reduced Ejection Fraction | Heart Failure NYHA Class IV | Heart Failure With Normal Ejection Fraction | Heart Failure; With Decompensation | Heart Failure...United States, Canada
-
Manipal UniversityUnknownHeart Failure | Decompensated Heart Failure | Acute Heart Failure | Diastolic Heart Failure | Systolic Heart FailureIndia
-
University Hospital, MontpellierCompletedHeart Failure | Diastolic Heart Failure | Systolic Heart Failure Stage CFrance
-
VA Eastern Colorado Health Care SystemNational Institute on Aging (NIA)CompletedHeart Failure | Heart Failure, Diastolic | Heart Failure, Systolic | Heart Failure With Reduced Ejection Fraction | Heart Failure With Preserved Ejection Fraction | Heart Failure; With Decompensation | Heart Failure,Congestive | Heart Failure AcuteUnited States
-
Lancaster General HospitalLouise von Hess Medical Research InstituteEnrolling by invitationDiastolic Heart FailureUnited States
-
Wake Forest UniversityCompletedHeart Failure, Congestive | Heart Failure With Preserved Ejection Fraction
-
Wake Forest UniversityNational Institute on Aging (NIA)CompletedHeart Failure, Congestive | Diastolic Heart FailureUnited States
-
Giresun UniversityIstanbul University - Cerrahpasa (IUC)RecruitingHeart Failure | Diastolic Heart Failure | Systolic Heart FailureTurkey
-
US Department of Veterans AffairsCompleted