Condition category
Circulatory System
Date applied
Date assigned
Last edited
Retrospectively registered
Overall trial status
Recruitment status

Plain English Summary

Background and study aims
Abdominal Aortic Aneurysm or AAA is an abnormal swelling of the aorta, the biggest artery in the body. It usually occurs in men aged over 65. An AAA can occasionally burst, leading to life-threatening bleeding. An AAA can be easily detected using a simple ultrasound scan. AAA screening programmes are now available across the UK through the NHS. These programmes invite all men at the age of 65 to have an ultrasound scan to check for AAA. Most of the men found to have an AAA in screening do not need surgery as their AAA is small in size. These men are, however, offered regular ultrasound scans to check the growth of the AAA. We already know that if someone has even a small AAA, they are far more likely to develop heart attacks and strokes compared to people without AAA. In fact, most people who have a small AAA will not die because of their AAA but because of a heart attack or a stroke. Despite this, individuals with AAAs in the UK AAA screening programmes do not receive adequate help and support to prevent these problems. This is an important missed opportunity. Simple things like taking an aspirin, lowering cholesterol, lowering blood pressure and improving one's diet can greatly decrease the chances of heart attacks and strokes. Unfortunately there hasn't been much research in this area and we do not know how to best support people with AAA to help them take advantage of these treatments.

The existing NHS AAA screening programmes can be used to improve the treatment of people with small AAAs by offering them medication, diet support, and other help to prevent heart attacks and strokes. The aim of this research is to develop and then test a health intervention specifically for men with AAA, which will improve their health and reduce their chances of heart attacks and strokes.

Who can participate?
Adult men with an abdominal aortic aneurysm identified through the existing NHS Abdominal Aortic Aneurysm (AAA) Screening Programme (NAAASP)

What does the study involve?
This research will consist of two stages:
1) In the first stage, patients with AAA, their relatives, and experts in this area will work together to develop the health intervention aimed to improve the heart health of those with AAA. First, patients with AAAs and their families will be approached and invited to take part in the research. Experts including General Practitioners (GPs), public health doctors, surgeons who treat AAA, NHS staff from NHS AAA screening programmes and psychologists will also be invited. The first step will be to identify the barriers that prevent good heart care in people with AAA. Then, the patients and experts will discuss how these barriers can be overcome. The health intervention will eventually be designed using the information from those discussions
2) In the second stage, the intervention will be tested in the Leicestershire AAA screening unit to assess how many men with AAA will take it up. Eventually, a national study will confirm whether it works and whether it offers value-for-money in the NHS

What are the possible benefits and risks of participating?
If this study is successful, the existing NHS AAA screening programmes will be used as a platform to offer people with small AAAs better medical care and reduce the chance of heart attacks and strokes. This will benefit thousands of patients across the UK and prevent hundreds of admissions and deaths every year. It will bring significant cost savings to the NHS as the treatment of these health problems is very expensive.
No risks.

Where is the study run from?
NHS Abdominal Aortic Aneurysm Screening Programme, Public Health England (UK)

When is the study starting and how long is it expected to run for?
August 2019 to October 2024

Who is funding the study?
National Institute for Health Research (NIHR) (UK)

Who is the main contact?
Athanasios Saratzis,
Prof. Colin Greaves,
Dr Tom Withers,

Trial website

Contact information



Primary contact

Mr Athanasios Saratzis


Contact details

500 Groby Road
BHF Cardiovascular Research Facility
Glenfield Hospital
United Kingdom
+44 (0)121 252 4785



Additional contact

Prof Colin Greaves


Contact details

School of Sport
Exercise and Rehabilitation Sciences
University of Birmingham
B15 2TT
United Kingdom
+44 (0)121 414 8061



Additional contact

Dr Tom Withers


Contact details

School of Sport
Exercise and Rehabilitation Sciences
University of Birmingham
B15 2TT
United Kingdom
+44 (0)121 414 8061

Additional identifiers

EudraCT number

Nil known number

Nil known

Protocol/serial number

0746, IRAS 273793

Study information

Scientific title

Cardiovascular Risk reduction In the NHS abdominal aortic aneurysm (AAA) Screening Programme: a co-developed cardiovascular prevention intervention (CRISP)



Study hypothesis

All 65 year-old men in the UK are invited for an ultrasound (US) to screen for AAA. The vast majority of those with AAA enter a disease-surveillance programme, undergoing regular repeat US. There are 11,601 men in AAA-surveillance, spending an average 4-7 years in follow-up. Screening has minimal effect on all-cause mortality. The principal preventable cause of mortality in AAA-surveillance is cardiovascular disease. Regular attendance at surveillance clinics represents an excellent opportunity to address cardiovascular-risk. Unfortunately, AAA-surveillance was not designed to deliver cardiovascular-risk modification. Consequently, uptake of cardiovascular-risk management in AAA-surveillance is poor and does not follow National Institute for Health and Care Excellence (NICE) guidance in most instances. In this study we are therefore going to develop and test a cardiovascular-risk reduction intervention for the specific needs of individuals with AAA.

Ethics approval

Approved 15/01/2020, East Midlands - Leicester Central Research Ethics Committee (The Old Chapel, Royal Standard Place, Nottingham, NG1 6FS; +44 0207 972 2568;, ref: 19/EM/0366.

Study design

Qualitative study with potential future quantitative feasibility study (mixed methodology)

Primary study design


Secondary study design

Trial setting


Trial type


Patient information sheet


Abdominal aortic aneurysm


There are two phases to this study, this registration concerns phase 2.
In Phase 1, we will develop an intervention that will help patients with an abdominal aortic aneurysm improve their heart health. Invited participants who have provided written informed consent will take part in remote focus groups (up to 90 minutes each, up to 4 focus group sessions) and, if necessary, in one hour long interviews (telephone or via a computer). Both patients with aneurysms (or carers/partners) will be invited to take part in these focus groups as well as healthcare professionals. This process will take a year. Once we have the necessary data from the participants, we will finalise the structure of the intervention.

Phase 2
In the second phase (Phase 2) of the research, we will test whether the intervention can be used in current NHS care and within aneurysm screening programmes. We will invite patients from phase 1 and additional patients with aneurysms to use the intervention for six months. We will record their cardiovascular health when they are invited to take part and after six months. We will also assess how easy it was to use the intervention.

The CRISP intervention aims to address the following areas of best medical care/therapy in individuals who have an abdominal aortic aneurysm (small or moderate size) and are having surveillance using ultrasound scans:
1. Smoking cessation: A clear and easy to follow pathway, including patient-centred discussion of barriers and referral to existing NHS smoking cessation services available locally and regionally.
2. Lifestyle modifications: physical activity and diet assessed when one is diagnosed with an aneurysm in screening programmes and then the individual (if needed) is supported in setting and achieving specific targets for change (lose weight, eat healthy based on current guidance).
3. Antiplatelet agents: Aspirin 75mg (or Clopidogrel 75mg if Aspirin is contra-indicated) offered to all individuals and their primary care doctor is updated via direct communication.
4. Lipid control: Atorvastatin 80mg offered to all individuals regardless of baseline lipid levels and their primary care doctor is updated via direct communication.
5. Blood pressure control: A target of 140/90mmHg should be achieved; the primary care doctor is contacted via direct communication in order to achieve that target with appropriate pharmacotherapy

The intervention will include:
1. One initial face-to-face consultation (to assess and discuss risk-factors, address motivation and barriers and decide what actions and specific risk-factors to initially target)
2. Telephone-based remote follow-up (potentially with further face to face catch-up meetings)

Intervention type



Drug names

Primary outcome measure

1. Proportion of patients agreeing to take part out of all patients invited at six months (recruitment rate) measured using case report forms
2. Proportion of people recruited who provide data at the end of the intervention period i.e. at six months (retention rate) measured using case report forms
3. Percentage of intervention sessions that participants complete at six months (intervention uptake) measured using case report forms
4. Intervention acceptability to patients (assessed qualitatively using semi-structured interviews and a satisfaction questionnaire) and service providers (assessed qualitatively)

Secondary outcome measures

There are no secondary outcome measures

Overall trial start date


Overall trial end date


Reason abandoned (if study stopped)


Participant inclusion criteria

1. Men with an abdominal aortic aneurysm identified through the existing NHS Abdominal Aortic Aneurysm (AAA) Screening Programme (NAAASP)
2. Any healthcare professional involved in the care of individuals with an abdominal aortic aneurysm

Participant type


Age group




Target number of participants

15 patients, 30 stakeholders

Participant exclusion criteria

Age <18 years

Recruitment start date


Recruitment end date



Countries of recruitment

United Kingdom

Trial participating centre

NHS Abdominal Aortic Aneurysm Screening Programme
Public Health England Zone B, Floor 2 Skipton House 80 London Road
United Kingdom

Sponsor information


University of Leicester

Sponsor details

Research Governance Office
Research & Enterprise Division
Leicester General Hospital
Sponsor's Office
United Kingdom
+44 (0)116 258 4867

Sponsor type




Funder type


Funder name

National Institute for Health Research

Alternative name(s)


Funding Body Type

government organisation

Funding Body Subtype

National government


United Kingdom

Results and Publications

Publication and dissemination plan

The results of the study will be published in medical journals, media, posted to patients and presented to those in charge of AAA screening as well as health-policy makers.

IPD sharing statement:
The datasets generated during and/or analysed during the current study are available from the corresponding author on reasonable request. Data will become available on 01/10/2022 and for five years.
Data will only be shared for qualitative analyses with qualified researchers, once a request has been made to the chief investigator and once the request has been reviewed and approved by the study Sponsor; all data will be anonymised and non-identifiable. No patient quotes will be shared. No individual patient level data will be shared at any time. Data will only be shared via an NHS computer or NHS email.

Intention to publish date


Participant level data

Available on request

Basic results (scientific)

Publication list

Publication citations

Additional files

Editorial Notes

17/11/2020: Trial’s existence confirmed by NHS HRA East Midlands - Leicester Central Research Ethics Committee