Long-term comorbidity patterns in juvenile idiopathic arthritis

Area of Science:

• Rheumatology
• Clinical Epidemiology
• Public Health

Background:

• Juvenile idiopathic arthritis (JIA) can cause long-term morbidity, but comorbidities in adults with established disease are poorly understood.
• Understanding the burden of comorbidities is crucial for managing adult JIA patients effectively.

Purpose of the Study:

• To determine the prevalence and incidence of key comorbidities in adults with JIA.
• To investigate associations between comorbidities and demographic/clinical features in JIA patients.

Main Methods:

• Retrospective cohort study of 748 adults with JIA using the Portuguese Rheumatic Diseases Register (Reuma.pt).
• Data collected included demographics, clinical features, and comorbidities (cardiovascular disease, hypertension, diabetes, osteoporosis, etc.).
• Incidence rates (per 1,000 person-years) and prevalence (frequencies) were calculated.

Main Results:

• Hypertension (9%), psychiatric disease (8%), and osteoporosis (5%) were the most prevalent comorbidities.
• Autoimmune diseases (7.1/1000 PY), hypertension (5.1/1000 PY), and psychiatric disease (4.0/1000 PY) showed the highest incidence.
• Biologic DMARD use was linked to a lower risk of psychiatric disease (OR=0.38, p=0.03).

Conclusions:

• Adults with long-standing JIA have a high burden of comorbidities, with hypertension being particularly common.
• Biologic therapy may offer a protective effect against developing certain comorbidities in JIA patients.
• Continuous monitoring for comorbidities is essential for the long-term management of JIA.