# Protocol for a Diagnostic Test Accuracy of Histological Muscle and Skin Biopsies of Rheumatoid Arthritis Patients Revealing Objective Chronic Widespread Pain Phenomena Related to Fibromyalgia

> **NCT06305026** · — · COMPLETED · sponsor: **Esbjerg Hospital - University Hospital of Southern Denmark** · enrollment: 48 (actual)

## Conditions studied

- Rheumatoid Arthritis
- Fibromyalgia, Secondary
- Widespread Chronic Pain
- Muscle Disorder

## Interventions

- **DIAGNOSTIC_TEST:** Muscle- and skin biopsies

## Key facts

- **NCT ID:** NCT06305026
- **Lead sponsor:** Esbjerg Hospital - University Hospital of Southern Denmark
- **Sponsor class:** OTHER
- **Phase:** —
- **Study type:** OBSERVATIONAL
- **Status:** COMPLETED
- **Start date:** 2024-02-07
- **Primary completion:** 2024-11-22
- **Final completion:** 2025-06-01
- **Target enrollment:** 48 (ACTUAL)
- **Last updated:** 2025-08-12

## Collaborators

- [object Object]

## Primary source

ClinicalTrials.gov registry: https://clinicaltrials.gov/study/NCT06305026

## Citation

> US National Library of Medicine, ClinicalTrials.gov registration NCT06305026, "Protocol for a Diagnostic Test Accuracy of Histological Muscle and Skin Biopsies of Rheumatoid Arthritis Patients Revealing Objective Chronic Widespread Pain Phenomena Related to Fibromyalgia". Retrieved via AI Analytics 2026-06-29 from https://api.ai-analytics.org/clinical/NCT06305026. Licensed CC0.

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