Pain in Endometriosis And the Relation to Lifestyle

NCT ID: NCT06332560

Last Updated: 2025-08-11

Study Results

Results pending

The study team has not published outcome measurements, participant flow, or safety data for this trial yet. Check back later for updates.

Basic Information

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Recruitment Status

RECRUITING

Clinical Phase

NA

Total Enrollment

250 participants

Study Classification

INTERVENTIONAL

Study Start Date

2024-10-04

Study Completion Date

2027-05-31

Brief Summary

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The goal of this clinical trial is to investigate the effect of an anti-inflammatory diet and cognitive behavioral therapy (CBT) on pain symptoms, health related quality of life and the effect on inflammatory characteristics in serum and menstruum samples as well as the effect on the gut and vaginal microbiome in women with endometriosis. In addition, we want to investigate the differences in stress (measured by hair cortisol levels), inflammatory markers in peripheral blood, menstrual effluent, and the vaginal and intestinal microbiome between persons without and with endometriosis. Participants will be randomized between standard care (control group), standard care and an anti-inflammatory diet intervention, or standard care, an anti-inflammatory diet intervention and CBT or CBT alone. Participants will follow an anti-inflammatory diet based on the Dutch Dietary Guidelines or CBT or a combination of both interventions for 12 weeks. They will receive personalized dietary advice from a dietician and recipes will be available. cognitive behavioral therapy will be administered in a total of seven individual sessions led by a psychotherapist. The content of these sessions will be psycho-education regarding pain mechanisms (and diet).

Detailed Description

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Conditions

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Endometriosis Adenomyosis

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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Standard care (control group)

Group Type NO_INTERVENTION

No interventions assigned to this group

Standard care and an anti-inflammatory diet (DI group)

Group Type EXPERIMENTAL

Anti-inflammatory diet (DI)

Intervention Type BEHAVIORAL

12-week personalized dietary advice based on the Dutch Dietary Guidelines under the guidance of a dietician.

Standard care, anti-inflammatory diet and cognitive behavioral therapy (DI + CBT group)

Group Type EXPERIMENTAL

Anti-inflammatory diet (DI)

Intervention Type BEHAVIORAL

12-week personalized dietary advice based on the Dutch Dietary Guidelines under the guidance of a dietician.

Cognitive behavioral therapy (CBT)

Intervention Type BEHAVIORAL

Seven individual sessions led by a psychotherapist. The content of the CBT will be psycho-education regarding pain mechanisms and DI.

Standard care and cognitive behavioral therapy (CBT group)

Group Type EXPERIMENTAL

Cognitive behavioral therapy (CBT)

Intervention Type BEHAVIORAL

Seven individual sessions led by a psychotherapist. The content of the CBT will be psycho-education regarding pain mechanisms and DI.

Healthy controls

Healthy controls without endometriosis

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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Anti-inflammatory diet (DI)

12-week personalized dietary advice based on the Dutch Dietary Guidelines under the guidance of a dietician.

Intervention Type BEHAVIORAL

Cognitive behavioral therapy (CBT)

Seven individual sessions led by a psychotherapist. The content of the CBT will be psycho-education regarding pain mechanisms and DI.

Intervention Type BEHAVIORAL

Other Intervention Names

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DI CBT

Eligibility Criteria

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Inclusion Criteria

* Confirmed diagnosis of endometriosis via ultrasound, MRI or surgery\*
* NRS pain score \> 4\*
* Age from 17 years
* Premenopausal status
* Body Mass Index (BMI) 18-30 kg/m2
* Ability to understand the explanation about the diet intervention (DI) and CBT\*
* Willing to follow the DI\*
* Willing to continue their use of food supplements
* Willing to undergo CBT\*
* Willing to collect menstrual effluent, and therefore willing to have two stop weeks from hormonal contraception (if applicable) during the study period.

Exclusion Criteria

* Recurrent miscarriages (\> 2)
* Eating disorder
* Diagnosed with Crohn's disease, Ulcerative Colitis, short bowel syndrome or another chronic inflammatory disease
* Self-reported celiac disease
* Vegan diet
* Smoking
* Use of immunosuppressive or psychotropic medication
* Score on FFQ \> 120
* Diagnosed with severe mental disorder currently requiring treatment by psychiatrist
* NRS average score below 4 during the last month
* Participation in another intervention study
* Unable to speak Dutch or to understand the intervention
* Need for surgery during the participation in the study
* Serious pain (NRS \> 4) from other origin than endometriosis
* Pregnant
* Scalp hair shorter than 4 cm

* Only applicable to patients with endometriosis
Minimum Eligible Age

17 Years

Eligible Sex

FEMALE

Accepts Healthy Volunteers

Yes

Sponsors

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ZonMw: The Netherlands Organisation for Health Research and Development

OTHER

Sponsor Role collaborator

Belgian Volition SRL

UNKNOWN

Sponsor Role collaborator

ASSOCIATION OF PEOPLE WITH ENDOMETRIOSIS I AM 1 IN 10

UNKNOWN

Sponsor Role collaborator

Wageningen University and Research

OTHER

Sponsor Role collaborator

Endometriosis UK

UNKNOWN

Sponsor Role collaborator

University College Cork

OTHER

Sponsor Role collaborator

SVEUCILISTE U ZAGREBU MEDICINSKI FAKULTET

UNKNOWN

Sponsor Role collaborator

UNIWERSYTET MEDYCZNY W LUBLINIE

UNKNOWN

Sponsor Role collaborator

University of Edinburgh

OTHER

Sponsor Role collaborator

Cliniques universitaires Saint-Luc- Université Catholique de Louvain

OTHER

Sponsor Role collaborator

Université Catholique de Louvain

OTHER

Sponsor Role collaborator

University Bonn

UNKNOWN

Sponsor Role collaborator

Biopsychology

UNKNOWN

Sponsor Role collaborator

Horizon Europe

UNKNOWN

Sponsor Role collaborator

Radboud University Medical Center

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Jeroen Bosch Hospital (JBZ)

's-Hertogenbosch, , Netherlands

Site Status RECRUITING

Rijnstate Hospital

Arnhem, , Netherlands

Site Status RECRUITING

Amphia

Breda, , Netherlands

Site Status RECRUITING

Catharina Hospital

Eindhoven, , Netherlands

Site Status RECRUITING

Radboud University Medical Center

Nijmegen, , Netherlands

Site Status RECRUITING

Countries

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Netherlands

Central Contacts

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Emma Huijs

Role: CONTACT

06-29698762

Facility Contacts

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M.C. Herman, PhD

Role: primary

P Dijkhuizen, PhD

Role: primary

J.S. Hoogstad-van Evert, PhD

Role: primary

H.A.A.M van Vliet, PhD, MD

Role: primary

E Huijs, B

Role: primary

Other Identifiers

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NL86247.091.24

Identifier Type: -

Identifier Source: org_study_id

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