Prevalence of Carotid Artery Stenosis and Abdominal Aortic Aneurysms in Brussels: a Population-based Screening Study.

Study Overview
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Brief Summary
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Both abdominal aortic aneurysm (AAA) and carotid artery stenosis (CAS) are frequent clinical entities, with major morbidity and mortality. This project obtains robust data on the prevalence of AAA and CAS in the Brussels Capital Region. Using duplex ultrasound, a low invasive examination, we want to obtain information on a vast sample of men and women of the Brussels capital region, starting at the age of 60. With these data we can have a far better view on the Belgian situation of these two main vascular clinical entities. The data can provide insights on if, and how, Belgian public health policy can be improved concerning AAA and CAS.

Detailed Description
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A population-based screening study to determine the prevalence of carotid artery stenosis (CAS) and abdominal aortic aneurysms (AAA) in the Brussels Capital Region. The study population is the 60+ inhabitants of the Brussels capital region; recruitment of 4680 subjects. Using duplex ultrasound, a low invasive examination, information is obtained on the abdominal aortic diameter and the degree of stenosis of the carotid bifurcation. The objective is to determine not only the prevalence of, but also the risk factors associated with CAS and AAA among 60+ Brussels inhabitants. To collect these data, a questionnaire is made including demographic features, associated risk factors, but also previous treatment for AAA or CAS and the current medication of the subject. Examination is done by one-time duplex ultrasound to perform a diameter measurement of the abdominal aorta and determine the degree of stenosis of the carotid arteries. Data collection will be done in an electronic case report form, and statistical analysis will be done by a multi-variable logistic regression model.

Official Title
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Prevalence of Carotid Artery Stenosis and Abdominal Aortic Aneurysms in Brussels: a Population-based Screening Study.

Conditions
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Carotid Artery Stenosis, Abdominal Aortic Aneurysm, Epidemiology

Intervention / Treatment
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* Diagnostic Test: Duplex ultrasound


Participation Criteria
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Eligibility Criteria
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Inclusion Criteria: Candidate is at least 60 years old. Candidate lives in Brussels capital region at the time of study participation. Candidate must sign and date the informed consent form prior to study participation. Exclusion Criteria: 1. Candidate is suspected of being unable to comply with the study protocol.

Ages Eligible for Study
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Minimum Age: 60 Years

Sexes Eligible for Study
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All

Accepts Healthy Volunteers
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Accepts Healthy Volunteers

Study Plan
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How is the study designed?
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Design Details

Primary Purpose: Screening
Intervention Model: Single Group Assignment
Masking: None (Open Label)


Arms and Interventions

| Participant Group/Arm | Intervention/Treatment |
| --- | --- |
| Other: Epidemiologic screening<br>All subjects are screened by duplex ultrasound for abdominal aortic aneurysm (AAA) and carotid artery stenosis (CAS). A questionnaire is completed to obtain information on demographic information, risk factors as well as prior treatment for AAA or CAS and current medication. No treatment is given. | Diagnostic Test: Duplex ultrasound<br>* A one-time carotis and abdominal aorta duplex ultrasound will be performed on-site by a skilled site staff to determine the prevalence of, and risk factors associated with, CAS and AAA. A diameter measurement will be performed of the abdominal aorta as well as a determination of the carotid arteries.<br>|

What is the study measuring?
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Primary Outcome Measures

| Outcome Measure | Measure Description | Time Frame |
| --- | --- | --- |
| Prevalence of CAS and AAA among 60+ Brussels inhabitants. | Determine the prevalence using echo duplex screening. | Screening period of 2 years | 
| Risk factors associated with CAS and AAA among 60+ Brussels inhabitants. | Determine the risk factors via a questionnaire: Smoking (ex - current - none) Hypertension (medical history - current) Coronary Artery Disease (history of angina pectoris or myocardial infarction) Diabetes Mellitus (history of diet or medically-treated diabetes - type I or II) History of Cerebro Vascular Disease (stroke or TIA) Family (parents/siblings) history (AAA, CVD, …) Hypercholesterolemia Body weight & length (BMI) COPD | Screening period of 2 years | 

 Terms related to the study
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Keywords Provided by Centre Hospitalier Valida
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Carotid Artery Stenosis, Abdominal Aortic Aneurysm, Epidemiology, Stenosis, Population screening