The Risk for Cardiovascular Events Associated with Hyperlipdemia among Patients with and Without Rheumatoid Arthritis

Area of Science:

• Rheumatology
• Cardiology
• Epidemiology

Background:

• Cardiovascular disease (CVD) is a major concern in rheumatoid arthritis (RA).
• Limited data exist on CVD event rates and risk factor contributions in RA versus non-RA populations.
• The
• lipid paradox
• hypothesis suggests reduced CVD risk despite dyslipidemia in RA.

Purpose of the Study:

• To determine the overall and sex-specific risk of cardiovascular (CV) events in patients with RA compared to a non-RA cohort.
• To assess the impact of hyperlipidemia on CV event risk in RA patients.
• To investigate the validity of the
• lipid paradox
• hypothesis in RA.

Main Methods:

• Retrospective cohort study using US commercial health plan claims data (2005-2011).
• Included patients with RA and matched non-RA controls.
• Cox proportional hazards regression analyzed CV events (myocardial infarction, stroke, revascularization), controlling for covariates.

Main Results:

• RA patients had a 1.68-fold increased risk of CV events (HR=1.68; 95% CI: 1.50, 1.87) compared to non-RA patients.
• Hyperlipidemia significantly increased CV event risk in both RA and non-RA cohorts.
• No significant interaction was found between RA and hyperlipidemia (p=0.13), refuting the
• lipid paradox
• .

Conclusions:

• Patients with RA exhibit an elevated risk of cardiovascular events.
• Hyperlipidemia exacerbates CV risk in RA patients, similar to the general population.
• This study challenges the
• lipid paradox
• hypothesis, emphasizing aggressive CV risk management in RA.