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Abstract Number: 2892

The Relative Risk of Incident NON-Ischemic Heart Failure  in Prevalent Rheumatoid Arthritis

Ängla Mantel1, Marie Holmqvist2, Johan Askling3, Lars Lund4 and Daniel Andersson5, 1Dept of Medicine, Clinical Epidemiology Unit, Dept of Medicine, Karolinska Institutet, Solna, Sweden, 2Karolinska Institutet, Unit of Clinical Epidemiology, Department of medicine, Stockholm, Sweden, 3Clinical Epidemiology Unit, Department of Medicine, Karolinska Institutet, Stockholm, Sweden, 4Karolinska Institutet, Unit of Cardiology section for Heart Failure. Department of Medicine, Stockholm, Sweden, 5Karolinska Institutet, Unit of Cardiology section for heart failure. Department of Medicine, Stockholm, Sweden

Meeting: 2014 ACR/ARHP Annual Meeting

Keywords: Epidemiologic methods, heart disease and rheumatoid arthritis (RA)

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Session Information

Session Title: Epidemiology and Public Health IV: Rheumatoid Arthritis Pathogenesis

Session Type: Abstract Submissions (ACR)

Background/Purpose: Patients with rheumatoid arthritis (RA) may be at increased risk of developing heart failure (HF). Inflammatory activity has been linked to the pathogenesis of HF by inducing structural changes of the myocardium. Despite these indications of a potential link between RA-related factors and non-ischemic HF, the relative risk of non-ischemic HF in contemporary patients with RA has not yet been assessed. The objective of this study was therefore o assess the relative risk of incident non-ischemic heart failure in contemporary patients with prevalent RA.

Methods: Using the Swedish nationwide patient register, a cohort of patients with prevalent RA was identified between 2006 and 2012 and matched with up to 10 general population comparators based on sex, age and area of residency. An index-date, defined as the second visit listing RA (comparators received the same index-date as their corresponding case), was assigned to all study subjects and all study participants with ischemic heart disease (IHD) and/or HF prior to the index-date were excluded. Thereafter all study subjects were followed for the outcome, defined as a first-time hospitalization or outpatient visit listing a main diagnosis of HF. All subjects were followed until outcome, death, incident IHD, first emigration or 31 December 2012, whichever occurred first. Crude rates were calculated and presented as number of events per 1000 person-years. Cox regression models were used to assess the relative risk of HF in patients with RA and adjusted for potential confounders.  

Results: In total, 41982 patients with RA and 360763 general population comparators free of IHD and HF at the index-date were identified. During the follow-up period (median follow-up for RA-patients 4.6 years [iqr 2.4-6.0] and comparators 4.8 years [iqr 2.5-6.1]), 630 (1.5 %) of patients with RA and 3058 (0.8%) of the comparators were registered with incident HF. The rate of HF was 3.6 HF/1000 person-years among the RA-patients and 2.0 HF/1000 person-years among the comparators. The corresponding risk increase of incident HF among the patients with RA was approximately 70% (Crude HR 1.69 [95% CI 1.56-1.85]) and remained statistically significantly increased after adjusting for potential confounders (Adjusted HR 1.53 [95% CI 1.40-1.67]). Stratifying RA patients by RF-positivity at index-date did not reveal any major differences between these two subgroups (Crude HR RF-positive subjects 1.66 [95% CI 1.51-1.84]; Crude HR RF-negative subjects 1.78 [95% CI 1.52-2.07]).

Conclusion: Patients with prevalent RA have an increased risk of developing non-ischemic HF. Our results support the proposed involvement of RA-related factors in the pathogenesis of HF, independent of vascular disease. The role of autoantibodies and other markers of RA disease is an important subject for further research.

 


Disclosure:

Mantel,
None;

M. Holmqvist,
None;

J. Askling,
None;

L. Lund,
None;

D. Andersson,
None.

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