Mortality in patients with giant cell arteritis

Area of Science:

• Rheumatology
• Epidemiology
• Public Health

Background:

• Giant cell arteritis (GCA) is a systemic vasculitis affecting large arteries.
• Understanding the long-term mortality associated with GCA is crucial for patient management.

Purpose of the Study:

• To investigate the association between a biopsy-proven diagnosis of GCA and all-cause mortality.
• To identify specific causes of death contributing to potential increased mortality in GCA patients.

Main Methods:

• Nationwide population-based cohort study using Danish registers (1993-2011).
• Included 1787 patients with biopsy-proven GCA and a matched comparison cohort of 33,953 individuals.
• Poisson regression analysis used to calculate mortality rate ratios.

Main Results:

• A slightly increased relative risk of death was observed 0-2 years (RR 1.17) and >10 years (RR 1.22) post-GCA diagnosis.
• No increased mortality was found between 2 and 10 years after diagnosis (RR 0.96).
• Early excess mortality was primarily linked to circulatory system diseases, including aortic aneurysms.

Conclusions:

• GCA is associated with a modest increase in both early and late mortality.
• Circulatory diseases represent a significant contributor to the excess mortality observed in the early years following GCA diagnosis.