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Study suggests siblings of people with RA are at increased risk of acute coronary syndrome

June 15, 2018

The results of a study presented today at the Annual European Congress of Rheumatology (EULAR 2018) demonstrate an increased risk of acute coronary syndrome (ACS) in siblings of individuals with rheumatoid arthritis (RA), suggesting shared susceptibility between the two diseases.1

RA is a chronic inflammatory disease that affects a person's joints, causing pain and disability. It can also affect internal organs. RA is more common in older people, but there is also a high prevalence in young adults, adolescents and even children, and it affects women more frequently than men.

"We welcome these results as they contribute to our understanding of cardiovascular risk in patients with rheumatoid arthritis," said Professor Thomas Dörner, Chairperson of the Abstract Selection Committee, EULAR. "This is important because cardiovascular disease is the main driver for the increased morbidity and mortality seen in patients."

ACS is an umbrella term used to describe a range of conditions associated with the sudden, reduced blood flow to the heart such as a heart attack or unstable angina. Recent studies have demonstrated that severity of RA disease is associated with the risk of ACS, suggesting that it is the RA disease itself contributing to the excess risk.2

A recently published report demonstrated that despite more efficient control of inflammation in RA during recent years, the excess risk for ACS among patients with RA compared to the general population remains elevated.3 This suggests there may be a shared susceptibility between the two conditions. To examine this, study authors investigated the risk of ACS in siblings of individuals with RA. If there were shared susceptibility between the two conditions, non-RA siblings would also have an increased risk of ACS due to their similar genetic set-up and background.

"Our results provide evidence of shared susceptibility between RA and ACS," said Dr Helga Westerlind, Karolinska Institutet (study author). "Although the nature of this needs to be further investigated, we believe that to bring down the cardiovascular risk in patients with RA, cardio-preventive measures must go beyond optimised RA disease control."

Results showed that patients with early RA and their siblings were 44% and 23% more likely to suffer from an ACS event than matched comparator subjects from the general population. A direct comparison of patients with RA to their siblings demonstrated that those with RA had a 19% higher risk of ACS than their siblings.1

This Swedish Rheumatology Quality (SRQ) register is linked to the Swedish Multigeneration Register, Patient Register, the Cause of Death register, and the Total Population Register. Through this, investigators identified 7,492 patients with RA from the SRQ (1996-2015) who had 10,671 full siblings, the patients with RA were matched for age and gender with 35,120 comparator subjects along with their 47,137 full siblings.1

Abstract number: OP0136
-end-
NOTES TO EDITORS

For further information on this study, or to request an interview with the study lead, please do not hesitate to contact the EULAR Press Office:

Email: eularpressoffice@ruderfinn.co.uk
Telephone: +44 (0) 20 7438 3084
Twitter: @EULAR_Press
YouTube: Eular Press Office

About Rheumatic and Musculoskeletal Diseases

Rheumatic and musculoskeletal diseases (RMDs) are a diverse group of diseases that commonly affect the joints but can affect any organ of the body. There are more than 200 different RMDs, affecting both children and adults. They are usually caused by problems of the immune system, inflammation, infections or gradual deterioration of joints, muscle and bones. Many of these diseases are long term and worsen over time. They are typically painful and Iimit function. In severe cases, RMDs can result in significant disability, having a major impact on both quality of life and life expectancy.4

About 'Don't Delay, Connect Today!'

'Don't Delay, Connect Today!' is a EULAR initiative that unites the voices of its three pillars, patient (PARE) organisations, scientific member societies and health professional associations - as well as its international network - with the goal of highlighting the importance of early diagnosis and access to treatment. In the European Union alone, over 120 million people are currently living with a rheumatic disease (RMD), with many cases undetected.5 The 'Don't Delay, Connect Today!' campaign aims to highlight that early diagnosis of RMDs and access to treatment can prevent further damage, and also reduce the burden on individual life and society as a whole.

About EULAR

The European League against Rheumatism (EULAR) is the European umbrella organisation representing scientific societies, health professional associations and organisations for people with RMDs. EULAR aims to reduce the burden of RMDs on individuals and society and to improve the treatment, prevention and rehabilitation of RMDs. To this end, EULAR fosters excellence in education and research in the field of rheumatology. It promotes the translation of research advances into daily care and fights for the recognition of the needs of people with RMDs by the EU institutions through advocacy action.

To find out more about the activities of EULAR, visit: http://www.eular.org.

References

1 Westerlind H, Holmqvist M, Ljung L, et al. Siblings of patients with rheumatoid arthritis are at increased risk of acute coronary syndrome. EULAR 2018; Amsterdam: Abstract OP0136.

2 Ljung L, Askling J, Rantapää-Dahlqvist S, et al. The risk of acute coronary syndrome in rheumatoid arthritis in relation to tumour necrosis factor inhibitors and the risk in the general population: a national cohort study. Arthritis Res Ther. 2014;16(3):R127.

3 Holmqvist M, Ljung L, Askling J. Acute coronary syndrome in new-onset rheumatoid arthritis: a population-based nationwide cohort study of time trends in risks and excess risks. Ann Rheum Dis. 2017;76(10):1642-1647.

4 van der Heijde D, et al. Common language description of the term rheumatic and musculoskeletal diseases (RMDs) for use in communication with the lay public, healthcare providers and other stakeholders endorsed by the European League Against Rheumatism (EULAR) and the American College of Rheumatology (ACR). Annals of the Rheumatic Diseases. 2018;doi:10.1136/annrheumdis-2017-212565. [Epub ahead of print].

5 EULAR. 10 things you should know about rheumatic diseases fact sheet. Available at: https://www.eular.org/myUploadData/files/10%20things%20on%20RD.pdf [Last accessed April 2018].

European League Against Rheumatism

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