Intersession Processes in Psychotherapeutic Treatments Using an Ecological Momentary Assessment Approach (ISA-Bell)

NCT ID: NCT05553197

Last Updated: 2025-06-25

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

84 participants

Study Classification

INTERVENTIONAL

Study Start Date

2022-11-01

Study Completion Date

2026-05-31

Brief Summary

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The effects of a monitoring intervention as an add-on to face-to-face Cognitive Behavioral Therapy (CBT) for depression are assessed in this randomised trial. Monitoring consists of Ecological Momentary Assessment (EMA) of symptoms and inter-session processes via mobile phones. Twenty sessions of face-to-face CBT + EMA are compared to twenty sessions of face-to-face CBT (treatment as usual, TAU). 84 patients with mild to moderate depression will be randomised to CBT + EMA or to TAU.

Detailed Description

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As mobile technologies advance, healthcare is increasingly utilising mobile interventions to accompany traditional interventions such as psychotherapy. Mobile assessments of symptoms and other processes are also used as low-level interventions and are believed to lead to symptom improvements in patients with symptoms of depression, for example. However, robust evidence on the health benefits of monitoring interventions in patients with depression is lacking.

The investigators are interested in the potential benefits of a monitoring intervention as an add-on to face-to-face Cognitive Behavioral Therapy (CBT) for depression. Therefore, the investigators will conduct a randomised trial to investigate the effects of a monitoring intervention consisting of Ecological Momentary Assessment (EMA) of symptoms and inter-session processes via mobile phones. Twenty sessions of face-to-face CBT + EMA will be compared to twenty sessions of face-to-face CBT (treatment as usual, TAU). Participants in the CBT + EMA group will be asked to answer monitoring questions twice daily for two four-week blocks during the CBT treatment. A total of 84 participants with mild to moderate depression will be randomized. Of these, 48 participants will be randomized to CBT + EMA and 36 participants will be randomized to TAU. The primary outcome of interest is change in the Patient Health Questionnaire (PHQ-9) score at four-month follow-up assessment.

Throughout the study, there will be five assessment timepoints: Baseline (before the first therapy session), four weeks after the fourth therapy session, four weeks after the twelfth therapy session, after the last session (post-treatment) and the 4-month follow-up (four months after the last therapy session).

Conditions

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Depression

Study Design

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Allocation Method

RANDOMIZED

Intervention Model

PARALLEL

4/7 of participants will be randomised to CBT + EMA and 3/7 to TAU. This randomisation ratio is chosen to foster longitudinal analyses in the CBT + EMA group. Randomisation is stratified by pre-treatment severity of depressive symptoms. Participants with PHQ-9 scores 5-9 will be randomised separately from participants with PHQ-9 scores 10-20.
Primary Study Purpose

TREATMENT

Blinding Strategy

NONE

As is common in psychotherapy research, participants and care providers cannot be blinded to the intervention. Only subjective outcomes (i.e., participant-rated) are assessed.

Study Groups

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Cognitive Behavior Therapy + Ecological Momentary Assessment (CBT + EMA)

Cognitive Behavior Therapy + Ecological Momentary Assessment

Group Type EXPERIMENTAL

Cognitive Behavioural Therapy (CBT)

Intervention Type BEHAVIORAL

20 sessions of face-to-face, individual CBT

Ecological Momentary Assessment (EMA)

Intervention Type OTHER

Two four-week blocks of twice daily ecological momentary assessment (EMA) of symptoms and inter-session processes

Treatment as Usual (TAU)

Cognitive Behavioural Therapy (Treatment as Usual)

Group Type ACTIVE_COMPARATOR

Cognitive Behavioural Therapy (CBT)

Intervention Type BEHAVIORAL

20 sessions of face-to-face, individual CBT

Interventions

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Cognitive Behavioural Therapy (CBT)

20 sessions of face-to-face, individual CBT

Intervention Type BEHAVIORAL

Ecological Momentary Assessment (EMA)

Two four-week blocks of twice daily ecological momentary assessment (EMA) of symptoms and inter-session processes

Intervention Type OTHER

Eligibility Criteria

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Inclusion Criteria

* ICD-10 diagnosis of mild or moderate depression, first or recurrent episode (F32.0, F32.1, F33.0, F33.1)
* PHQ-9 ≥ 5
* Possession of smartphone with internet access
* Signed informed consent

Exclusion Criteria

* Acute or past suicidality; self-reported
* Acute addiction (F10 - F19)
* Dysthymia (F34.1), postpartum depression, or severe depression (F32.3; F33.3)
* PHQ-9 \> 20
* Depression not main mental health concern
* Planned onset or planned change in antidepressant medication
* History of psychotic symptoms, bipolar disorder, personality disorders, or organic brain disorders
* Cognitive impairment or physical disability that would hinder psychotherapy or the use of a smartphone
Minimum Eligible Age

18 Years

Eligible Sex

ALL

Accepts Healthy Volunteers

No

Sponsors

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Universität Tübingen

OTHER

Sponsor Role collaborator

Birgit Watzke

OTHER

Sponsor Role lead

Responsible Party

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Birgit Watzke

Full Professor

Responsibility Role SPONSOR_INVESTIGATOR

Principal Investigators

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Birgit Watzke, PhD

Role: PRINCIPAL_INVESTIGATOR

University of Zurich

Locations

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Psychotherapeutisches Zentrum Universität Zürich

Zurich, Canton of Zurich, Switzerland

Site Status RECRUITING

Countries

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Switzerland

Central Contacts

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Louisa Jagmetti, M.Sc.

Role: CONTACT

+41 44 635 73 28

Fiona Fäh

Role: CONTACT

+41 44 635 73 21

Facility Contacts

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Louisa Jagmetti, M.Sc.

Role: primary

+41 44 635 73 28

Fiona Fäh

Role: backup

+41 44 635 73 21

Other Identifiers

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10001C_200760

Identifier Type: -

Identifier Source: org_study_id

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