Rheumatoid Arthritis: Complications & Impact on Life Expectancy

Rheumatoid arthritis (RA), a chronic autoimmune disease primarily affecting the joints, extends its impact beyond pain and mobility. While advancements in treatment have improved quality of life for many, understanding the potential effects of RA on life expectancy is crucial. Complications arising from the disease itself, and sometimes from its treatment, can contribute to a reduced lifespan, though the extent of this reduction varies significantly.

Cardiovascular Risks: A Primary Concern

A significant factor influencing life expectancy in individuals with RA is an increased risk of cardiovascular disease (CVD). As Dr. Andrew Holman, CEO and cofounder of Inmedix, explains, RA patients experience a heightened susceptibility to heart attacks and other cardiovascular issues. Everyday Health reports that this isn’t simply a coincidence; people with RA also exhibit higher levels of sympathetic nervous system activity – the “fight or flight” response – which contributes to cardiovascular strain. This sustained adrenaline release is itself considered an independent risk factor for CVD.

The cardiovascular manifestations of RA are diverse, encompassing accelerated atherosclerosis (the narrowing and hardening of arteries), heart failure, inflammation of the heart’s outer sac (pericarditis), inflammation of the heart muscle (myocarditis), and infection of the heart’s inner lining (endocarditis). Individuals with RA are also more likely to have established cardiovascular risk factors, including high blood pressure, obesity, metabolic syndrome, abnormal lipid levels, and a history of smoking.

The Impact of Lung Disease

Beyond the heart, the lungs are another area of concern for those living with RA. Individuals with RA have an eight times higher chance of developing lung disease compared to the general population. Specifically, interstitial lung disease (ILD) – a group of disorders characterized by inflammation and scarring of the lung tissue – affects approximately 1 in 10 people with RA. ILD occurs when the immune system mistakenly attacks the lungs, leading to scarring that progressively impairs breathing. In severe cases, a lung transplant may become necessary.

Research indicates that pulmonary complications are directly responsible for 10 to 20 percent of deaths among people with RA. A strong link exists between RA-ILD and increased mortality, particularly from respiratory illnesses and cancer.

Infection and Immune Suppression

The very nature of RA – an autoimmune condition – and the medications used to manage it can compromise the immune system, increasing susceptibility to infection. Immunosuppressing and immunomodulating drugs, such as glucocorticoids, biologics, and disease-modifying antirheumatic drugs (DMARDs), while effective in controlling RA symptoms, can exit individuals vulnerable to a range of infections. Studies indicate that people with RA have a 2.2 times higher risk of death due to infection compared to those without the condition.

While bacterial infections are the most common, viral infections like shingles, hepatitis B, and tuberculosis may also occur more frequently or reactivate in individuals with RA. Rarely, fungal infections can also prove fatal.

The Role of Mental Health: Depression and Mortality

The connection between physical and mental health is increasingly recognized, and RA is no exception. Depression is a common comorbidity, occurring at a rate two to three times higher in people with RA than in the general population. Researchers suggest a bidirectional relationship, where inflammation associated with RA may contribute to depression, and conversely, depression can worsen RA symptoms and alter pain perception. Depression can, in turn, contribute to a reduction in life expectancy.

Studies have shown that patients with RA who also experience depression have a higher risk of mortality compared to those without depression. A large meta-analysis of 268 studies found a twofold increased mortality risk in people with depression compared to control subjects, with a significantly elevated risk of suicide.

Cancer Risk in RA: A Complex Picture

Research suggests that RA may be associated with a slightly elevated risk of certain cancers. An Australian study involving over 14,000 people with RA found that while the overall incidence of cancer was lower in this group compared to those without RA, specific cancer types – particularly lung cancer and blood cancers like lymphoma – were more prevalent. The study also indicated lower overall survival rates for RA patients diagnosed with cancer, with increased mortality observed across most cancer subtypes.

While the use of biologics was initially considered a potential contributing factor, growing evidence points to chronic inflammation as a direct driver of increased cancer risk in RA. However, the increased risk remains relatively modest; for non-Hodgkin lymphoma, the risk increases from 2 percent to 4 percent.

Navigating the Future: Monitoring and Management

Understanding these potential complications is not about instilling fear, but about empowering individuals with RA and their healthcare providers to proactively manage risks. Regular cardiovascular screenings, lung function tests, and monitoring for signs of infection are essential. Addressing mental health concerns, including depression and anxiety, is equally essential.

Ongoing research continues to refine our understanding of the interplay between RA, its treatments, and long-term health outcomes. The recent approval of vagus nerve stimulation as a potential treatment for RA, as reported by Healio, represents a potential “pivot point” in rheumatology, offering a novel approach to managing the disease and potentially mitigating some of its long-term effects.

For individuals living with RA, maintaining open communication with their healthcare team, adhering to prescribed treatment plans, and adopting a healthy lifestyle remain the cornerstones of maximizing both quality of life and longevity. Staying informed about the latest research and guidelines, and participating in shared decision-making with their doctors, are also vital steps in navigating the complexities of this chronic condition.