Step by Step Group Therapy for Bulimia Nervosa: Effectiveness and Mechanisms of Change.

NCT ID: NCT06063278

Last Updated: 2026-01-20

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

COMPLETED

Clinical Phase

NA

Total Enrollment

100 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-05-06

Study Completion Date

2024-11-12

Brief Summary

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This a pseudo-randomized clinical trial that examines if a specific group therapy for BN is effective in improving its symptomatology, and what variables mediate such improvements. To do so a sample of 100 patients with BN will be pseudorandomized in a Group Therapy for BN or in a control waiting list group. Patients will be assessed at baseline, at the end of the group therapy and at 2 year follow up.

Detailed Description

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This is a controlled non randomized study that will compare a group of patients with BN that participate in the SBS group therapy with a group of BN patients who will be in wait list as a control condition.

Patients for this single center trial will be recruited from the outpatient facility of the Hospital de la Santa Creu I Sant Pau (Barcelona, Spain).

After assessed for eligibility participants will be given a set of self -report questionnaires. After the questionnaires are completed participants will be allocated to wait list condition or to the treatment arm. Time between assessment and starting the SBS group will be a month or least. Participants will be administered the same questionnaires the following month after finishing the treatment or after 3 to 4 months after the first assessment for the control condition.

Conditions

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Bulimia Nervosa

Study Design

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Allocation Method

NON_RANDOMIZED

Intervention Model

PARALLEL

Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

Study Groups

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BN Group

Patients will take part of a Therapeutic BN Group

Group Type EXPERIMENTAL

l Group Therapy for BN.

Intervention Type BEHAVIORAL

9 to 10 group sessions of 90 to 120min each

Waiting List

Participants will be in the waiting list.

Group Type NO_INTERVENTION

No interventions assigned to this group

Interventions

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l Group Therapy for BN.

9 to 10 group sessions of 90 to 120min each

Intervention Type BEHAVIORAL

Eligibility Criteria

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Inclusion Criteria

* Diagnostic of Bulimia Nervosa

Exclusion Criteria

* Not understanding Spanish or Catalan Language
Minimum Eligible Age

18 Years

Maximum Eligible Age

65 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Fundació Institut de Recerca de l'Hospital de la Santa Creu i Sant Pau

OTHER

Sponsor Role lead

Responsible Party

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Responsibility Role SPONSOR

Locations

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Hospital de la Santa Creu i Sant Pau

Barcelona, , Spain

Site Status

Countries

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Spain

References

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Agh T, Kovacs G, Supina D, Pawaskar M, Herman BK, Voko Z, Sheehan DV. A systematic review of the health-related quality of life and economic burdens of anorexia nervosa, bulimia nervosa, and binge eating disorder. Eat Weight Disord. 2016 Sep;21(3):353-364. doi: 10.1007/s40519-016-0264-x. Epub 2016 Mar 4.

Reference Type BACKGROUND
PMID: 26942768 (View on PubMed)

- Andrade-González, N., & Fernández-Liria, A. (2016). Spanish adaptation of the working alliance inventory-short (WAI-S). Current Psychology, 35(1), 169-177.

Reference Type BACKGROUND

Fairburn CG, Bailey-Straebler S, Basden S, Doll HA, Jones R, Murphy R, O'Connor ME, Cooper Z. A transdiagnostic comparison of enhanced cognitive behaviour therapy (CBT-E) and interpersonal psychotherapy in the treatment of eating disorders. Behav Res Ther. 2015 Jul;70:64-71. doi: 10.1016/j.brat.2015.04.010. Epub 2015 Apr 22.

Reference Type BACKGROUND
PMID: 26000757 (View on PubMed)

Hay P. A systematic review of evidence for psychological treatments in eating disorders: 2005-2012. Int J Eat Disord. 2013 Jul;46(5):462-9. doi: 10.1002/eat.22103.

Reference Type BACKGROUND
PMID: 23658093 (View on PubMed)

Polnay A, James VA, Hodges L, Murray GD, Munro C, Lawrie SM. Group therapy for people with bulimia nervosa: systematic review and meta-analysis. Psychol Med. 2014 Aug;44(11):2241-54. doi: 10.1017/S0033291713002791. Epub 2013 Nov 15.

Reference Type BACKGROUND
PMID: 24238470 (View on PubMed)

Other Identifiers

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IIBSP-BUL-2021-144

Identifier Type: -

Identifier Source: org_study_id

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