New lupus criteria: a critical view

Area of Science:

• Rheumatology
• Immunology
• Clinical Diagnostics

Background:

• Systemic lupus erythematosus (SLE) is a complex autoimmune disease.
• Accurate classification criteria are crucial for diagnosis and research.
• Previous criteria required updates to reflect current understanding.

Purpose of the Study:

• To review the validation of the European League Against Rheumatism (EULAR)/American College of Rheumatology (ACR) 2019 classification criteria for SLE.
• Assess the global performance of the EULAR/ACR 2019 criteria.

Main Methods:

• Systematic review of studies validating the EULAR/ACR 2019 criteria.
• Analysis of sensitivity and specificity across diverse patient cohorts.
• Evaluation of criteria performance in specific populations like pediatric and early SLE.

Main Results:

• The EULAR/ACR 2019 criteria demonstrate high sensitivity (92%) and specificity (93%) for SLE classification.
• Antinuclear antibodies, an entry criterion, are positive in 97% of SLE patients.
• The criteria show good performance in pediatric and early SLE cases.

Conclusions:

• The EULAR/ACR 2019 criteria are a validated and effective tool for classifying SLE worldwide.
• Adherence to attribution rules and domain structure is critical for accurate application.
• These criteria enhance diagnostic accuracy and facilitate research in SLE.