Long-term follow-up of patients with Complex Regional Pain Syndrome

Longitudinal Follow-up Study About Complex Regional Pain Syndrome (CRPS). Which Are the Predictors for Return to Work and Recovery

Observational Clinique Romande de Readaptation · NCT04703647

This study is tracking how people with Complex Regional Pain Syndrome feel and function over two years to see how their pain, quality of life, and mental health change.

Quick facts

Study typeObservational
Enrollment110 (estimated)
Ages18 Years and up
SexAll
SponsorClinique Romande de Readaptation Research network
Locations1 site (Sion, Valais)
Trial IDNCT04703647 on ClinicalTrials.gov

What this trial studies

This observational study aims to prospectively monitor the evolution of Complex Regional Pain Syndrome (CRPS) Type I in patients, focusing on various health parameters such as quality of life, pain severity, and psychosocial factors over a two-year period. Participants will complete questionnaires to assess their symptoms, disability, and mental health, while blood samples will be collected to analyze potential biomarkers associated with CRPS. The study seeks to understand how these factors correlate with recovery and overall health status in CRPS patients.

Who should consider this trial

Good fit: Ideal candidates include adults over 18 years old with a diagnosis of CRPS Type I affecting a distal limb and experiencing pain for less than six months.

Not a fit: Patients with chronic pain conditions other than CRPS or those with severe psychological disorders may not benefit from this study.

Why it matters

Potential benefit: If successful, this study could lead to improved understanding and management of CRPS, potentially enhancing patient recovery and quality of life.

How similar studies have performed: While there have been studies on CRPS, this specific longitudinal approach focusing on psychosocial factors and biomarkers is relatively novel.

Eligibility criteria

Show full inclusion / exclusion criteria
Inclusion Criteria for patients:

* CRPS Type I (fulfilling Budapest criteria for research)
* Suffering of CRPS in a distal limb (hand or foot)
* Age \>18 years
* Pain lasting less than 6 months
* Good understanding of the French language

Inclusion criteria for control:

* Not suffering from chronic pain, including CRPS
* Age \>18 years

Exclusion Criteria for both group:

* Known or suspected non-compliance, drug or alcohol abuse,
* Inability to follow the procedures of the study, e.g. due to language problems, severe psychological disorders, dementia, etc
* For blood sample: diabetes and history of hepatitis B, C, D or HIV infection

Where this trial is running

Sion, Valais

Study contacts

How to participate

  1. Review the eligibility criteria above with your treating physician.
  2. Visit the official trial page on ClinicalTrials.gov for the most current contact information and recruitment status.
  3. Contact the listed study coordinator or principal investigator to request pre-screening. Pre-screening is free and never obligates you to enroll.
Conditions Complex Regional Pain Syndrome Type Ipainbiopsychosocial modelmiRNAscytokinesupper limblower limb
Last reviewed 2026-06-13 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.