Pulmonary function in patients with rheumatoid arthritis

Area of Science:

• Pulmonary Medicine
• Rheumatology
• Immunology

Background:

• Rheumatoid arthritis (RA) is a chronic autoimmune disease primarily affecting joints.
• Extraarticular manifestations, including lung involvement, can occur in RA.
• Pulmonary function in RA patients requires further investigation.

Purpose of the Study:

• To assess pulmonary function in patients with definite or classical rheumatoid arthritis.
• To correlate pulmonary function test results with disease duration and activity.
• To investigate the prevalence of subclinical lung involvement in RA.

Main Methods:

• Pulmonary function tests were administered to 106 women and 38 men with rheumatoid arthritis.
• Results were analyzed in relation to disease duration and clinical activity parameters.
• Statistical analysis was performed to determine significance (p < 0.05).

Main Results:

• Pulmonary diffusion capacity was significantly reduced compared to predicted values (p < 0.05).
• This reduction was observed irrespective of disease duration or clinical activity.
• No other extraarticular manifestations were required for this finding.

Conclusions:

• Reduced pulmonary diffusion capacity is a common finding in rheumatoid arthritis.
• Inflammatory vascular changes in the lungs likely occur early in RA.
• Pulmonary involvement may be present even without overt extraarticular signs.