Genetic Variants and Postoperative Pain

January 5, 2026 updated by: Insel Gruppe AG, University Hospital Bern
Prospective observational study to analyse patients' pain related outcome after surgery and ist association to genetic variants and non-genetic variables.

Study Overview

Status

Status

Indicates the current recruitment status or the expanded access status.
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.

Detailed Description

Background

Severe acute pain as well as long-lasting pain after surgery and pain-related interference of daily activities are frequent. Some risk factors for severe pain after surgery in adults have been described, e.g. younger age and pre-existing chronic pain. The question arises whether a specific genetic background is related to an unfavorable pain outcome.

Objective

The aim of this study is to investigate clinical and genetic variables and their possible association to severe acute postoperative pain, higher analgesic consumption and the development of chronic postsurgical pain.

Methods

Prospective observational study investigating clinical, patient related, surgery related and anesthesia related variables as well as genetic variants and their possible association to patients' pain related outcome after surgery.

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.
5000

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

Study Locations

  • Switzerland
      • Bern, Switzerland, 3010
        • Recruiting
        • Department of Anaesthesiology and Pain Medicine, Inselspital, University of Bern
        • Principal Investigator:
          • Ulrike M Stamer, MD
        • Contact:
        • Contact:

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

18 years and older (Adult, Older Adult)

Accepts Healthy Volunteers

Yes

Sampling Method

Non-Probability Sample

Study Population

Adult patients scheduled for elective surgery

Description

Inclusion Criteria:

  • 18 years and older
  • Written informed consent
  • Elective surgery
  • Patients' ability to understand the purpose of the study

Exclusion Criteria

  • No informed consent
  • Cognitive impairment

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

Cohorts and Interventions

Group / Cohort

Group / Cohort

A group or subgroup of participants in an observational study that is assessed for biomedical or health outcomes.
All patients
Patients undergoing elective surgery with anesthesia

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
Pain related impairment after surgery and its association to genetic and non-genetic variables
Time Frame: day of surgery up to 1 year after surgery
Measured by the International Pain Outcomes Questionnaire, the Brief Pain Inventory (BPI): Numeric rating scale for pain intensities, affective and physical interference; Composite score = pain interference total scores (PITS scale 0-10) resulting in no interference (PITS=0), mild interference (PITS >0 and <2), moderate interference (PITS 2-5) and severe interference (PITS >5)
day of surgery up to 1 year 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
Association of genetic and non-genetic variables with analgesic consumption
Time Frame: day of surgery up to one year after surgery
analgesic consumption
day of surgery up to one year after surgery
Association of genetic and non-genetic variables with pain related outcome of patients 1 year after surgery
Time Frame: Up to one year after surgery

Measured by the Brief Pain Inventory (BPI) as pain interference total score PITS scale 0-10) resulting in no interference (PITS=0), mild interference (PITS >0 and <2), moderate interference (PITS 2-5) and severe interference (PITS >5).

Change of pain related impairment over time (before surgery, 2 days after surgery, 6 and 12 months after surgery)
Up to one year after surgery
Association of genetic and non-genetic variables with chronic neuropathic postsurgical pain
Time Frame: up to one year after surgery
Measured by a neuropathic pain questionnaire (number of neuropathic symptoms; at least three neuropathic symptoms are categorized as positive)
up to one year 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.
Insel Gruppe AG, University Hospital Bern

Investigators

Investigators

A researcher involved in a clinical study. Related terms include site principal investigator, site sub-investigator, study chair, study director, and study principal investigator.
  • Principal Investigator: Ulrike M Stamer, MD, Department of Anaesthesiology and Pain Medicine, Inselspital, University of Bern
  • Study Chair: Ulrike Stamer, Prof. MD, Department of Anaestheisolpogy + Pain Medicine, Inselspital, University of Bern

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 (Actual)

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.
January 2, 2011

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.
December 1, 2026

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.
April 1, 2027

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).
March 29, 2018

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.
March 29, 2018

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.
April 5, 2018

Study Record Updates

Last Update Posted (Estimated)

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.
January 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.
January 5, 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.
January 1, 2026

More Information

Terms related to this study

Keywords

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.
  • 041/09c Schmerz

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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