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Related Experiment Video

Updated: Nov 4, 2025

Intraoperative Detection of Subtle Endometriosis: A Novel Paradigm for Detection and Treatment of Pelvic Pain Associated with the Loss of Peritoneal Integrity
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Central sensitization inventory in endometriosis.

Natasha L Orr1,2, Kate J Wahl1,2, Michelle Lisonek2

  • 1Department of Obstetrics and Gynecology, University of British Columbia, Vancouver, BC, Canada.

Pain
|May 24, 2021
PubMed
Summary
This summary is machine-generated.

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The Central Sensitization Inventory (CSI) can identify endometriosis patients with central nervous system sensitization. A CSI score of 40 or higher may indicate pain not fully managed by conventional treatments, aiding clinical decisions.

Area of Science:

  • Gynecology
  • Pain Medicine
  • Neurology

Background:

  • Endometriosis pain is complex and may involve central nervous system sensitization.
  • Conventional treatments may not fully address pain in all endometriosis patients.
  • The Central Sensitization Inventory (CSI) is a validated tool for chronic pain populations.

Purpose of the Study:

  • To explore the utility of the CSI in identifying central sensitization in endometriosis patients.
  • To establish a CSI cutoff score to differentiate endometriosis patients with and without significant central pain contributors.
  • To assess the correlation between central sensitivity syndromes (CSS) and pain severity.

Main Methods:

  • Analysis of a prospective registry of 335 endometriosis patients (aged 18-50) at a tertiary referral center.

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  • Correlation analysis between the number of CSS and pain scores (dysmenorrhea, dyspareunia, dyschezia, chronic pelvic pain).
  • Receiver operating characteristic (ROC) analysis to determine the optimal CSI cutoff for identifying patients with ≥3 CSS.

    • Main Results:

    • A higher number of CSS correlated significantly with increased pain scores and CSI scores (r=0.731, P<0.001).
    • A CSI cutoff of 40 demonstrated 78% sensitivity and 80% specificity for identifying patients with ≥3 CSS.
    • Patients with CSI ≥ 40 reported higher rates of pain nonresponsive to hormonal therapy (18% vs 6%) and daily pain (40% vs 20%).

    Conclusions:

    • A CSI score of 40 or greater may serve as a practical tool to identify endometriosis patients experiencing pain related to central nervous system sensitization.
    • This finding can help clinicians better manage endometriosis-associated pain by considering central sensitization mechanisms.
    • Further research can validate this cutoff in larger, diverse endometriosis cohorts.