Pulmonary diseases in SLE: a population-based cross-sectional study.

Area of Science:

• Rheumatology
• Pulmonology
• Radiology

Background:

• Pulmonary diseases (PDs) are common in Systemic Lupus Erythematosus (SLE) but diagnosis is challenging.
• Previous prevalence estimates for PD in SLE vary widely (30-98%).
• A population-based study is needed to accurately determine PD prevalence in SLE.

Purpose of the Study:

• Determine the prevalence of PD in SLE patients.
• Investigate the prevalence of specific PD subtypes in SLE.
• Assess pulmonary function and its association with PD in SLE.
• Explore associations between patient characteristics and PD in SLE.

Main Methods:

• Population-based cross-sectional study in Region Southern Denmark.
• Included adult SLE patients meeting classification criteria.
• Utilized clinical assessment, pulmonary function tests (PFTs), and chest high-resolution CT (HRCT).
• Multidisciplinary discussion for PD and subtype diagnosis.

Main Results:

• PDs were found in 59% of 185 SLE patients.
• Prevalence of subtypes: interstitial lung diseases (12%), pleural diseases (19%), airway diseases (38%).
• PD associated with decreased pulmonary function, but PFTs had low diagnostic utility.
• No strong associations found between patient characteristics and PD presence.

Conclusions:

• 59% of SLE patients have PD, impacting pulmonary function.
• Clinical assessment and PFTs have limited value for diagnosing PD in SLE.
• HRCT and other specialized investigations are often necessary for accurate diagnosis.