Prevalence and Risk Factors for Chronic Post-Surgical Pain Following Video-Assisted Thoracic Surgery : The EVATHO Prospective Bicentric Cohort Study. (EVATHO)

June 29, 2026 updated by: University Hospital, Montpellier

Study of the Prevalence of Chronic Postoperative Pain After Video-Assisted Thoracic Surgery: A Bicentric Cohort Study

Chronic post-surgical pain (CPSP) remains a common complication after thoracic surgery and may significantly impair patients' quality of life. Although the widespread adoption of video-assisted thoracic surgery (VATS) has reduced surgical trauma and improved postoperative recovery, a substantial proportion of patients still develop persistent pain.

The EVATHO study is a multicenter prospective observational cohort designed to determine the prevalence of CPSP three months after VATS and to identify perioperative factors associated with its development. Adult patients undergoing thoracic surgery by VATS at Montpellier and Nice University Hospitals will be prospectively enrolled.

Pain intensity, neuropathic pain characteristics, anxiety, depression, quality of life, and analgesic consumption will be assessed using validated questionnaires during the perioperative period and at 1 and 3 months after surgery. The results of this study may help identify patients at increased risk of CPSP and improve perioperative pain management strategies following thoracic surgery.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
Not yet recruiting

Conditions

Conditions

The disease, disorder, syndrome, illness, or injury that is being studied. On ClinicalTrials.gov, conditions may also include other health-related issues, such as lifespan, quality of life, and health risks.

Study Type

Study Type

Describes the nature of a clinical study. Study types include interventional studies (also called clinical trials), observational studies (including patient registries), and expanded access.
Observational

Enrollment (Estimated)

Enrollment

The number of participants in a clinical study. The "anticipated" enrollment is the target number of participants that the researchers need for the study.
400

Contacts and Locations

This section provides the contact details for those conducting the study, and information on where this study is being conducted.

Study Contact

Study Contact

The name and contact information for the person who can answer enrollment questions for a clinical study. Each location where the study is being conducted may also have a specific contact, who may be better able to answer those questions.

Study Contact Backup

  • Name: Sophie Bringuier, MD
  • Phone Number: +33467335958

Participation Criteria

Researchers look for people who fit a certain description, called eligibility criteria. Some examples of these criteria are a person's general health condition or prior treatments.

Eligibility Criteria

Eligibility Criteria

The key requirements that people who want to participate in a clinical study must meet or the characteristics they must have. Eligibility criteria consist of both inclusion criteria (which are required for a person to participate in the study) and exclusion criteria (which prevent a person from participating). Types of eligibility criteria include whether a study accepts healthy volunteers, has age or age group requirements, or is limited by sex.

Ages Eligible for Study

  • Adult
  • Older Adult

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adult patients undergoing video-assisted thoracic surgery (VATS) for pulmonary resection, pleural procedures, chest wall surgery, or lung biopsy at Montpellier and Nice University Hospitals.

Description

Inclusion Criteria:

  • Adult patients undergoing video-assisted thoracic surgery (VATS) for thoracic surgery

Exclusion Criteria:

  • Age <18 years
  • Adults under legal protection or unable to provide informed non-opposition
  • Patients unable to understand or complete the study questionnaires
  • Patients not affiliated with a French health insurance scheme.
  • Adults under legal protection, including judicial safeguard, guardianship, or curatorship.
  • Participation in another clinical study involving an ongoing exclusion period.
  • Pregnant or breastfeeding women.

Study Plan

This section provides details of the study plan, including how the study is designed and what the study is measuring.

How is the study designed?

Design Details

What is the study measuring?

Primary Outcome Measures

Primary Outcome Measures

In a clinical study's protocol, the planned outcome measure that is the most important for evaluating the effect of an intervention/treatment. Most clinical studies have one primary outcome measure, but some have more than one.
Outcome Measure
Measure Description
Time Frame
Number of participants with chronic post-surgical pain
Time Frame: 3 months after surgery.
Chronic post-surgical pain defined as a Brief Pain Inventory (BPI) average pain score greater than 3 at the 3-month postoperative follow-up.
3 months after surgery.

Secondary Outcome Measures

Secondary Outcome Measures

In a clinical study's protocol, a planned outcome measure that is not as important as the primary outcome measure for evaluating the effect of an intervention but is still of interest. Most clinical studies have more than one secondary outcome measure.
Outcome Measure
Measure Description
Time Frame
Postoperative pain at 1 month after VATS
Time Frame: 1 month after thoracic surgery
Post-surgical pain defined as a Brief Pain Inventory (BPI) average pain score greater than 3 at the 1-month postoperative follow-up.
1 month after thoracic surgery
Visual Analogue Scale (VAS) pain score
Time Frame: Preoperative assessment, postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Pain intensity measured using the Visual Analogue Scale (VAS), with scores ranging from 0 (no pain) to 10 (worst imaginable pain).
Preoperative assessment, postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Cumulative postoperative opioid consumption.
Time Frame: Postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Total opioid consumption during the postoperative period as morphine milligram equivalents
Postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Douleur Neuropathie 4 (DN4) score
Time Frame: Preoperative assessment, postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Neuropathic pain measured using the Douleur Neuropathique 4 (DN4) questionnaire. Scores range from 0 to 10, with scores greater than or equal to 4 indicating neuropathic pain.
Preoperative assessment, postoperative day 1, postoperative day 2, 1 month, and 3 months after surgery.
Hospitalier Anxiety and depression Scale (HADS) anxiety score
Time Frame: Preoperative assessment, 1 month, and 3 months after surgery.
Anxiety measured using the hospital Anxiety and Depression Scale (HADS-A). Scores range from 0 to 21, with scores greater than or equal to 11 indicating clinically significant anxiety.
Preoperative assessment, 1 month, and 3 months after surgery.
Hospital Anxiety and Depression Scale (HADS) depression score
Time Frame: Preoperative assessment, 1 month, and 3 months after surgery
Depression measured using the Hospital Anxiety and Depression Scale (HADS-D). Scores range from 0 to 21, with scores greater than or equal to 11 indicating clinically significant depression.
Preoperative assessment, 1 month, and 3 months after surgery
Brief Pain Inventory (BPI) pain interference score
Time Frame: 1 month and 3 months after surgery.
Pain interference with daily activities measured using the Brief Pain Inventory (BPI) interference subscale
1 month and 3 months after surgery.
Short Form-12 Physical component summary score
Time Frame: Preoperative assessment, 1 month, and 3 months after surgery.
Physical health-related quality of life measured using the Physical Component Summary (PCS) score of the Short Form-12 (SF-12) questionnaire.
Preoperative assessment, 1 month, and 3 months after surgery.
Short form-12 Mental Component Summary score
Time Frame: Preoperative assessment, 1 month and 3 months after surgery
Mental health-related quality of life measured using the Mental Component Summary (MCS) score of the Short Form-12 (SF-12) questionnaire.
Preoperative assessment, 1 month and 3 months after surgery

Collaborators and Investigators

This is where you will find people and organizations involved with this study.

Sponsor

Sponsor

The organization or person who initiates the study and who has authority and control over the study.
University Hospital, Montpellier

Study record dates

These dates track the progress of study record and summary results submissions to ClinicalTrials.gov. Study records and reported results are reviewed by the National Library of Medicine (NLM) to make sure they meet specific quality control standards before being posted on the public website.

Study Major Dates

Study Start (Estimated)

Study Start

The actual date on which the first participant was enrolled in a clinical study. The "anticipated" study start date is the date that the researchers think will be the study start date.
August 1, 2026

Primary Completion (Estimated)

Primary Completion

The date on which the last participant in a clinical study was examined or received an intervention to collect final data for the primary outcome measure. Whether the clinical study ended according to the protocol or was terminated does not affect this date. For clinical studies with more than one primary outcome measure with different completion dates, this term refers to the date on which data collection is completed for all the primary outcome measures. The "anticipated" primary completion date is the date that the researchers think will be the primary completion date for the study.
April 1, 2028

Study Completion (Estimated)

Study Completion

The date on which the last participant in a clinical study was examined or received an intervention/treatment to collect final data for the primary outcome measures, secondary outcome measures, and adverse events (that is, the last participant's last visit). The "anticipated" study completion date is the date that the researchers think will be the study completion date.
August 1, 2028

Study Registration Dates

First Submitted

First Submitted

The date on which the study sponsor or investigator first submitted a study record to ClinicalTrials.gov. There is typically a delay of a few days between the first submitted date and the record's availability on ClinicalTrials.gov (the first posted date).
June 21, 2026

First Submitted That Met QC Criteria

First Submitted That Met QC Criteria

The date on which the study sponsor or investigator first submits a study record that is consistent with National Library of Medicine (NLM) quality control (QC) review criteria. The sponsor or investigator may need to revise and submit a study record one or more times before NLM's QC review criteria are met. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 29, 2026

First Posted (Actual)

First Posted

The date on which the study record was first available on ClinicalTrials.gov after National Library of Medicine (NLM) quality control (QC) review has concluded. There is typically a delay of a few days between the date the study sponsor or investigator submitted the study record and the first posted date.
July 7, 2026

Study Record Updates

Last Update Posted (Actual)

Last Update Posted

The most recent date on which changes to a study record were made available on ClinicalTrials.gov. There may be a delay between when the changes were submitted to ClinicalTrials.gov by the study's sponsor or investigator (the last update submitted date) and the last update posted date.
July 7, 2026

Last Update Submitted That Met QC Criteria

Last Update Submitted That Met QC Criteria

The most recent date on which the study sponsor or investigator submitted changes to a study record that are consistent with National Library of Medicine (NLM) quality control (QC) review criteria. It is the responsibility of the sponsor or investigator to ensure that the study record is consistent with the NLM QC review criteria.
June 29, 2026

Last Verified

Last Verified

The most recent date on which the study sponsor or investigator confirmed the information about a clinical study on ClinicalTrials.gov as accurate and current. If a study with a recruitment status of recruiting; not yet recruiting; or active, not recruiting has not been confirmed within the past 2 years, the study's recruitment status is shown as unknown.
June 1, 2026

More Information

Terms related to this study

Additional Relevant MeSH Terms

Other Study ID Numbers

Other Study ID Numbers

Identifiers or ID numbers other than the NCT number that are assigned to a clinical study by the study's sponsor, funders, or others. These numbers may include unique identifiers from other trial registries and National Institutes of Health grant numbers.
  • RECHMPL 25_0555

Plan for Individual participant data (IPD)

Plan to Share Individual Participant Data (IPD)?

NO

Drug and device information, study documents

Studies a U.S. FDA-regulated drug product

No

Studies a U.S. FDA-regulated device product

No

This information was retrieved directly from the website clinicaltrials.gov without any changes. If you have any requests to change, remove or update your study details, please contact register@clinicaltrials.gov. As soon as a change is implemented on clinicaltrials.gov, this will be updated automatically on our website as well.

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