Gender bias in diagnosing fibromyalgia

Area of Science:

• Rheumatology
• Clinical Practice
• Diagnostic Criteria

Background:

• Physician and patient factors influence fibromyalgia classification.
• Current diagnostic criteria for fibromyalgia (FM) may not fully reflect clinical practice.

Purpose of the Study:

• To assess the diagnostic criteria used for fibromyalgia.
• To understand how rheumatologists apply these criteria in clinical settings.

Main Methods:

• Survey of practicing rheumatologists.
• Analysis of case studies with random assignment of patient gender.
• Random forests classification to identify key diagnostic variables.

Main Results:

• Only 6.6% of rheumatologists strictly used the American College of Rheumatology (ACR) criteria.
• Key discriminating criteria included tender points, normal erythrocyte sedimentation rate, normal thyroid tests, fatigue, and poor sleep quality.
• Tender points were more frequently required for diagnosing male patients (P=0.047).

Conclusions:

• Rheumatologists' diagnostic thought processes for FM are complex and extend beyond ACR criteria.
• A minority of practitioners rely exclusively on established ACR classification criteria.
• Gender bias exists in FM diagnosis, with a tendency to require physical evidence more often in male patients.