CClinicalTrials.gg
Status unknownNCT05020600Updated Aug 15, 2023

The Effect of Central Sensitization on Treatment Response in Patients With Fibromyalgia

An observational study in Central Sensitisation and Fibromyalgia, sponsored by Marmara University. Status unknown at 1 site in Turkey. Open to participants aged 18 Years to 70 Years. Per ClinicalTrials.gov, last updated 2023-08-15.

Sponsored by Marmara University · Observational

The sponsor has not verified this record recently (last verified Nov 2022), so the status shown — last known as Recruiting — may be out of date.
Study type
Observational
Model
Cohort
Time perspective
Prospective
Enrollment
40
Ages
18 Years to 70 Years
Sex
All
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Study summary

Central sensitization (CS) is as increased response to normal or sub-threshold stimuli of central nervous system and its close relationship with fibromyalgia has been demonstrated in several studies. However, the effect of initial CS severity on treatment response in these patients is not fully known. In this study, it was aimed to investigate the severity of CS and its effect on treatment response in patients with fibromyalgia.

Read the detailed description

Fibromyalgia is a disease characterized by chronic widespread pain and its etiology and pathophysiology are still unknown.It is considered to be the main member of the central sensitization-related disease group known as central sensitivity syndromes with impaired pain regulation.In various studies, hyperalgesia and allodynia, which are accepted as objective findings of central sensitization in patients with fibromyalgia, strengthen the relationship between fibromyalgia and central sensitization. The central sensitization inventory (CSI) was developed in 2012 to be used in the recognition of central sensitivity syndromes in patients with fibromyalgia. A score of 40 and above is accepted in favor of central sensitization in the scale, which consists of two parts, in which central sensitization-related symptoms and diagnoses are questioned; scores of 30-39 are classified as mild, 40-49 moderate, 50-59 severe, and 60-100 very severe. Parallel to the increase in the CSI score, an increase is observed in patients' pain severity, disability, depressive symptoms and sleep disorders.In addition, it has been reported in the literature that factors such as pre-treatment pain severity and depression affect the treatment response.Considering all these factors, it is possible that there is a relationship between the severity of central sensitization and treatment response in patients with fibromyalgia.Based on this, in this study, it was aimed to investigate the effect of central sensitization severity, which was evaluated with CSI before treatment, on the treatment process.

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Conditions studied

  • Central Sensitisation
  • Fibromyalgia
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In context

Fibromyalgia

1,336 studies on the registry are indexed under Fibromyalgia; 266 are open to participants now.

This study's planned enrollment of 40 is below the median of 100 across 270 observational studies indexed under Fibromyalgia.

Browse Fibromyalgia studies →

Lead sponsor

Marmara University is the lead sponsor of 576 studies on the registry; 136 are open to participants now.

Counted across the registry records on this site, refreshed daily.

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Who can participate

Ages eligible
18 Years to 70 Years
Sexes eligible
All
Accepts healthy volunteers
No
Sampling method
Non-probability sample

Study population

Fibromyalgia patients

Inclusion criteria

  • Diagnosing fibromyalgia according to ACR 2016 criteria
  • Between the ages of 18-65
  • Agree to participate in the study

Exclusion criteria

Exclusion Criteria:

  • History of concomitant systemic inflammatory disease, active infection and malignancy
  • Refusing to participate in the study
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Study design

Observational model
Cohort
Time perspective
Prospective
Enrollment
40 participants (estimated)
Patient registry
No

Groups and cohorts

  • Patients with fibromyalgia

    Patients diagnosed with fibromyalgia according to American College of Rheumatology 2016 criteria

    Drug: Duloxetine · Drug: Pregabalin · Drug: Amitriptyline

Interventions

  • DrugDuloxetine

    First-line fibromyalgia treatment

    Also known as: Dyloxia

  • DrugPregabalin

    First-line fibromyalgia treatment

    Also known as: Lyrica

  • DrugAmitriptyline

    First-line fibromyalgia treatment

    Also known as: Laroxyl

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What researchers measure

Primary outcomes

  1. Visual analog scale ( VAS) pain

    Pain rating scale. The VAS consists of a 10cm line, with two end points representing 0 ('no pain') and 10 ('pain as bad as it could possibly be')

    Time frame: 2 year

  2. Symptom severity scale

    The SS scale quantifies symptom severity on a 0-12 scale by scoring problems with fatigue, cognitive dysfunction and unrefreshed sleep over the past week

    Time frame: 2 year

  3. Fibromyalgia impact scale

    The questionnaire was developed to determine the degree of being affected by the disease in patients with a diagnosis of fibromyalgia.The scale consists of 10 parts in total, and the first part is a Likert scale containing 11 questions. High scores indicate that the patient is overly affected.

    Time frame: 2 year

  4. Short Form-36

    Standardized questionnaire to investigate the quality of life in patients. The score of the scale is between 0-100. The higher scores are associated with greater deterioration in quality of life.

    Time frame: 2 year

  5. Central sensitization inventory

    Standardized questionnaire to determine the level of central sensitization. Patients with a score of 40 and above are considered to have central sensitization.

    Time frame: 2 year

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Study locations

1 of 1 sites recruiting
  • Feyza Nur YUCEL
    İstanbul, 34899, Turkey
    Recruiting
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References and documents

Publications

  • Woolf CJ, Thompson SW, King AE. Prolonged primary afferent induced alterations in dorsal horn neurones, an intracellular analysis in vivo and in vitro. J Physiol (Paris). 1988-1989;83(3):255-66. PubMed 3272296 ↗
  • Akinci A, Al Shaker M, Chang MH, Cheung CW, Danilov A, Jose Duenas H, Kim YC, Guillen R, Tassanawipas W, Treuer T, Wang Y. Predictive factors and clinical biomarkers for treatment in patients with chronic pain caused by osteoarthritis with a central sensitisation component. Int J Clin Pract. 2016 Jan;70(1):31-44. doi: 10.1111/ijcp.12749. Epub 2015 Nov 11. PubMed 26558538 ↗
  • Bhargava J, Goldin J. Fibromyalgia. 2025 Jan 31. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan-. Available from http://www.ncbi.nlm.nih.gov/books/NBK540974/ PubMed 31082018 ↗
  • Pomares FB, Funck T, Feier NA, Roy S, Daigle-Martel A, Ceko M, Narayanan S, Araujo D, Thiel A, Stikov N, Fitzcharles MA, Schweinhardt P. Histological Underpinnings of Grey Matter Changes in Fibromyalgia Investigated Using Multimodal Brain Imaging. J Neurosci. 2017 Feb 1;37(5):1090-1101. doi: 10.1523/JNEUROSCI.2619-16.2016. Epub 2016 Dec 16. PubMed 27986927 ↗
  • Mayer TG, Neblett R, Cohen H, Howard KJ, Choi YH, Williams MJ, Perez Y, Gatchel RJ. The development and psychometric validation of the central sensitization inventory. Pain Pract. 2012 Apr;12(4):276-85. doi: 10.1111/j.1533-2500.2011.00493.x. Epub 2011 Sep 27. PubMed 21951710 ↗
  • Neblett R, Hartzell MM, Mayer TG, Cohen H, Gatchel RJ. Establishing Clinically Relevant Severity Levels for the Central Sensitization Inventory. Pain Pract. 2017 Feb;17(2):166-175. doi: 10.1111/papr.12440. Epub 2016 Mar 15. PubMed 26989894 ↗
  • Wolfe F, Clauw DJ, Fitzcharles MA, Goldenberg DL, Hauser W, Katz RL, Mease PJ, Russell AS, Russell IJ, Walitt B. 2016 Revisions to the 2010/2011 fibromyalgia diagnostic criteria. Semin Arthritis Rheum. 2016 Dec;46(3):319-329. doi: 10.1016/j.semarthrit.2016.08.012. Epub 2016 Aug 30. PubMed 27916278 ↗
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Updates

Tracking since Sep 25, 2026
No changes since tracking began. The registry record was last updated on Aug 15, 2023, before this site started recording changes on Sep 25, 2026. Its history is on ClinicalTrials.gov ↗
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Registry details

Key details

Study ID
NCT05020600
Lead sponsor
Marmara University
Responsible party
Sponsor
First posted
Aug 25, 2021
Start date
Aug 19, 2021
Primary completion
Jun 1, 2024 (estimated)
Completion
Dec 1, 2024 (estimated)
Last update
Aug 15, 2023

Study contacts

Feyza N YUCEL, M.D
Contact
dr.fny28@gmail.com
05385577059
Canan SANAL TOPRAK, assoc. prof.
study director · Marmara University

Oversight

Data monitoring committee
No
FDA-regulated drug
No
FDA-regulated device
No
View the source record on ClinicalTrials.gov ↗

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This study is status unknown, as verified in Nov 2022. You cannot join it, but the record below documents what was studied.

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